Quoted from paynemic:
Kinda a newb at this. How do you wire that in? Mainly confused about the input side (are you joining after the power switch of the pinball?). A little sketch of the wiring would be a real help to us less knowledgeable guys. Thanks in advance.
Yes, you want to join after the power switch no matter what pin you are wiring up with. This goes for any accessory, mod, or powered subwoofer so that the device comes on when the master power switch is turned on. What you are looking for is the transformer primary side wire pair (usually a black and white wire colored pair) that runs from the power switch to the main transformer. In most games, the mains switch is in a metal enclosure. I prefer to make the tap connections within the box if present. Cut the wires cleanly about 4" away to give yourself some room, strip and connect all three black and all three white with wire nuts (diagram shows just black wire connection, do the same also for the white) PLEASE MAKE SURE YOUR GAME IS UNPLUGGED for safety before you tap into power, regardless if you believe the mains switch is off.
Notice also, according to the schematics for Maverick, the bill validator connection is also a viable option if not using a bill validator. To use it, all you would need is build a proper connector for your accessory.