Had to reconnect a couple of wires and switched out one more power connector. I also screwed in the special solenoid fuse kit and cleaned some of the dirt from the bottom of the back box.
FINALLY, tested the displays (and CPU board) and they all worked! I was not expecting all of them to work, so it was a pleasant surprise. Tried to put the game into free play mode, but ran out of time. I did plug in the diagnostic connector along with the two connectors for the switch matrix. I was able to get into the menu selection and changed setting “18” to “0”, but was not able to get a game started. I will look at it more when I have more time.
Curious to see if the sound board works. My initial guess is it’s going to need some work.