Virgil,

I am not suggesting you use my crude method to connect to your selector. My photo was to demonstrate how to connect the magnets in parallel. Even if your colors are different, you can see which  terminals must be tied together.

You may need an ohmmeter too trace them to the barrier strips. Same for the keyboard wires.

If you start poking around with an ohmmeter, be sure to pull the AC plug first, so you don't hit AC accidently and damage your meter.

It is possible that the magnets are already in parallel at the barrier strip. Check at the selector terminals first with the meter to see if they are wired in parallel, to save confusion as you trace the wires.

Tom   N3CRK