Bally 6000 Slot Machine Parts

I picked up a Bally 6000 Black & White machine with a S6000 mpu that had been converted for home play. It’s looks like it’s been through a few home players and bought is as a non-working unit. After replacing the battery and cleaning the board contacts I’ve run through all I’d the diagnostics with no errors.
My question is, I don’t know how to get the unit to play (how to tell if it’s free play) and don’t know what chips are installed (I’m guessing they are the clearing chips) See the photos.
Any information to help get this machine playing would be great. Thank you!