Hey,
I also have a Super Neo 29 and the Jamma Harness was alreday there, just had to plug in the board, I thinking that there is only one way to plug in the harness. I got mine from <a href="http://www.arcade-infinity.com," target="_blank">www.arcade-infinity.com,</a> so all they told me was no wiring necessary, just plug in the board and turn on the power. I hope this helps.