Need help splitting linked cabs.

Sorry for the ridiculous title. I didn't know how to word it. Basically, I got two cabs recently. They were linked together, so only one side has the power supply, board, harness, etc.

What I want to know is, how do I make them each stand alone machines? The one with the guts has some weird edge connector with a strand of wires going to the other machine. I think it might be for the coin mech on the leech cab... I haven't actually checked.

I presume buying a power supply as well as a JAMMA harness are in order? Is that it? (That would be sweet) Any help would be much appreciated.

multimeter is your friend start metering out where the rgb lines are from the guest cab.

where does the power to the monitor come into it from etc

get a nice few sheets of white paper and start testing this stuff with power off