I dont quite know what you mean about the 5 wires into a 6 slot plug, but I know that you can mount the coin-door lights using a computer PSU. If youre MAMEing the cabinet, and using a computer, then use a multimeter to see which wires on the marquee have the power. Then I suggest just using a power bar of some type. Pretty much everything can be powered through the power bar possibly using a transformer.