Green/red on the inside lug and Yellow/black on the outside lug. It's the same on Wiring to the coin door lights on all 4 of my Bally's.
A bit hard to see in the pic, but it looks like you are using the coin door as your "ground". It will work, but is not how it is meant to be, and I would imagine could cause other problems??
Thanks, it's been working on Flash Gordon and Xenon since I did the coin doors nearly 12 months ago but I did have an issue with Aux lamp board on FG awhile ago perhaps this was the reason? I'll swap mine over as well just to be sure.
