Response from Jonathan: Jeremy,

We like JAMMA harnesses that already have the quick disconnect terminals for the control wires and the fork terminals for the switching power supply wires crimped on the ends. Since most games do not use the -5 VDC line, we typically don’t care if it has it on the JAMMA harness or not. It’s easy enough to add into the harness if you do have a game that needs it.

We typically order our JAMMA harnesses from Cajun Arcade. His JAMMA Wiring Harness, Quality Version is what we like to use. We also order the labels with it as it makes it much easier when you’re trying to wire up a game. Unfortunately he’s out of stock but he should get them back in stock soon. Here’s a link: http://www.shop.cajunarcade.com/JAMMA-Wiring-Harness-Quality-Version-JWHQ001.htm.

Hope that helps. Thank you for your question and good luck with your future repairs.