Quoted from jjoravec:I picked up a Data East Lethal Weapon 3 and Jurassic Park. Both had the connector to the power supply set up like the picture. The power supply board takes a flat connector but the plug is a molex square. Is there supposed to be some kind of adapter wire to go between? Its odd I got 2 data east games and both are set up like the picture.
That's funky. So those weren't connected when you got the machines?
Original, as markp99 noted, should be the .156 9-pin header like you have on the board at CN8, with a matching plug on the cable-side instead of the block plug that you have - no 'adapter' in between. It looks like the header on the board has been replaced, but that doesn't explain the weird connector you have cable-side (assuming that those are indeed the eight wires that should be connected to CN8 - and it looks like they are.)
From the top-down on the CN8 header, your wires on the cable-end should be:
Brown
Yellow
Green
Violet
KEY
White-Brown
White-Yellow
White-Green
White-Violet
If those 8 are all there in that connector in your hand (it looks like they - I see green, yellow, and white-yellow, at least) then it should just be a matter of replacing that connector with a straight 9-pin .156.