>>11834692
the edge connector will be somewhere on the pcb gameboard itself
the pinout will be different for yours (and nearly every machine) pre-jamma but the idea\principal is the same
basically think of it like when you have a nes controller plugged into your system while its powered on but you disassembled it down to just the contact points
you can still trigger nes buttons by closing the circuit manually
same idea but the cab is bigger (dont touch the voltage or video lines anon)