It looks like it's probably a Falcon pinout. The controls differ on many of them, but usually the power, video and speakers are the same. It's hard to know exactly without testing. I've got a couple Pac-Man/Ms Pac bootlegs (not the same one you have) that all use the Falcon pinout, but when I hook it up to a Falcon JAMMA adapter (from Mark Spaeth, set up for Crazy Kong), the controls didn't work right.