1. Place the JAMMA Harness so (GND) pin 1, 2 and (+5v) Pin 3, 4 are shown like in the photo below.

2. Place the JAMMA board so the gap is up the end with pins 1,2,3,4. 

3. Gently push the JAMMA PCB into the JAMMA Harness, making sure the gold pin line up in the JAMMA harness.

     Installing the JAMMA board incorrectly may damage it and voids the warranty.