Hi Swoop, YOU the MAN!

After closer inspection of the card connector location pins, I found the location had some grit/grime. The pins all appeared to have white corrosion which i carefully cleaned, which was not an easy task trying to reach way down there to access the pins.

I cleaned the pins and gave them a slight twist, ever so gently.
I also cleaned to mating wire connector that plugs into the board location with plastic safe electronic contact cleaner. I then repetitively inserted/removed the connector several times to "wipe" the connectors. I considered applying dielectric silicone grease to this fitting since I found the corrosion, but was not sure if that was acceptable to use for this situation.

By the way, for reference, I did find additional spec ID tag on the card... IC3645EV OSC ASM.
Subject wire number was tagged "24"

This did the trick, at least for the time being.
After final reinsertion, I tested the wire by manually moving the wire checking controls for forward/reverse operation. The unit operation no longer "cuts out" while moving the wire.
Your solution did the trick!
Thank you very much

I was wondering if those black plastic 6 pin connectors are available as a "pig tale" with the wires, or only the plastic block and wire female pin connectors, in which case your mentioned removal/insertion tool may be required ???