Help identifying / dealing with an arcade board

Okay, I have the option at the moment of buying an old Tekken 3 arcade PCB for a fairly low amount. The auction states that “Game board will fit into any arcade cabinet.”

Auction Link Here.

I freely admit that I have little idea about how the inside of a cabinet works, so would buying this be any good for making a supergun-type setup, or is the seller assuming that any cab I put it in will already have some other board that this thing plugs into?

Cheers in advance - assuming of course that I’m making any sense.