here's my diaHam (named after the Ham shapped rca jacks)
it's for mini one slots and multislot boards mvs boards.....using the sc200 powersupply.
improvise on your own for a full jamma psu setup with -5v
all you need is the controller to harness wiring... and remember that the 2 coin buttons can be left out if you wire the coin insert to the select button on your controllers

Also, I use a surge protector, but someone may be able to help you with adding fuses to this if you would like.
here's what the big spots on the harness are: (1 wire to 4 pins)
love that diaHam
you can search for my "supergun layout" thread to find many questions and answers about this....