what did you use for the kick harness, did you splice into the existing cabnet and buy extra kick harnesses, and how do you install the diodes, I have KI1, KI2, mortal kombat 2, 3 , nba jam. that I want to put on the 6 in 1 switcher. I know I need the -5v for the midway pcb's but not quite sure on the extra buttons and how they wire up