Contact Shawn at Third Coast Pinball. He is producing back box harnesses and play field harnesses for some of us who are restoring some Classic Stern pins.

I looked at the O1 drawings at IPDB. And O1 is the same basic wiring as the other classic Sterns There are some differences but I think minor.

https://pinside.com/pinball/biz/directory/1180-third-coast-pinball

Sometimes, Captain, you just have to roll the dice.

In one of Game Room Collectables you tube videos, mechanic Ray was showing and Orbitor frame with those spinning bumpers. The video is not new but you might give them a call. Sure cannot hurt.

I’m thinking this could qualify for the score of a decade.

Truer words have never been spoken. When selling, patience is a virtue.

Only 889 Orbitor 1s produced.

It is nice to see one rise from the dead.

You are probably going to be looking for something from 3M company.

I do not know what would be proper but my thoughts lean toward upholstery type of adhesive. You spray the adhesive on both parts and let it sit for a minute, or whatever it says on the can. And then press one part to the other.

If you follow directions, the 2 parts will be bonded in a permanent manner.

I guess the question should be asked is if you want them to be bonded on permanently? Or do they need to be removable?

You want something that will peel like Post-it-note, it sound like. Or a merchandise price sticker that can be peeled off. A temporary bond, so to speak.

I have some 3M adhesive that I use to spray on the sanding discs I use on my dual action sander. It holds the discs good enough that I can use the DA and when the disc is worn out I can peel it off and spray a new disc and slap it on and go back to work.

I got this adhesive at an auto body supplies store.

You might try talking to someone at an auto upholstery shop.
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You might try to call someone at 3M

https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Adhesives-Tapes/Industrial-Adhesives-and-Tapes/Non-Structural-Adhesives/Spray-Adhesives/?N=5002385+5582877+8710676+8710815+8710968+8711017+8713605+3294857497&rt=r3
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What about hot glue? That is easy to apply with a hot glue gun. And when you heat it up with a hair dryer it gives up its bond very fast.

https://www.amazon.com/s

OK. I'm looking at your picture.

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You are wanting to attach these cardboard tubes to the under side of your play field. I agree with Darcy, replace the cardboard with plastic tubes. I think you could find the right diameter in PVC plumbing tubing. For what you are doing, hot glue should hold those tubes securely enough to the play field. Hot glue would be a temporary bond that can be broken with a hair dryer.

I'm 95% positive that the type of plastic the play field is made of is bondable and will accept Superglue. So you could bond either cardboard tubes or plastic PVC tubing to the play field in a permanent bond using superglue. But hot glue has good holding power and gives you the flexibility of a temporary bond.

If you wish to take it a little farther, you could bond a a small flat piece of plastic to the side of the plastic tubes; This would make a mount to which you could use a standard bayonet light bulb socket. You can buy bayonet sockets in all kinds of configurations for any type of mounting situation. The metal tabs on these sockets bends into any shape of angle easily. You could make the bulb fit into a plastic tube at any depth you would want and be able to get rid of that squeeze type socket if you wanted to.

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Those motors look like Dayton C-Frame motors.

https://www.google.com/search?q=dayton+c-frame+motors&source=lnms&tbm=isch&sa=X&ved=0ahUKEwicoKWC2cfjAhUBVa0KHXZGACMQ_AUIEigC&biw=1276&bih=897

Zoro.com carries a lot of these. All sizes. And there other sellers, as well.

https://www.zoro.com/dayton-c-frame-motor-shaded-pole-1-in-l-sleeve-4m070d/i/G0896384/feature-product?gclid=EAIaIQobChMIofPzhdnH4wIVRdbACh1OswMVEAQYAiABEgI59vD_BwE

I'll keep saying this because it is an easy item to overlook. On the Alltek MPU board, in the upper left hand corner of the board you will see two pin jumpers and two sets of 3-pins. To use the Alltek MPU on a Stern those jumpers need to be on the two left hand pins for correct operation. For Bally pins, the jumpers need to be on the two right hand pins. If you are not jumped correctly you may run into problems, such as flickering LEDs and general poor performance.

OK. Just for grins, on page 4 of the lamp board instructions, it matters which control lamp wire you attach the supplied jump wire to. Each control lamp is going to have one striped wire and one solid color wire. The instructions specify to attach the jumper to the solid color wire.

I doubt this is your problem and you are probably jumped correctly but this is the last item I know of that might help you.