What wires do you need to startup free play? One wire is a ground, and the other is a 'coin1' wire from the Jamma harness, correct?
I re-wired it to my free play start button, so I don't have to insert a quarter each time, and for some reason, nothing happens when I press it. Could it be that the wire has to be setup a certain way in the Barrel Insulated Female Connectors?