Neo-Geo Forums

Hello everyone. I just got a 4 slot MVS system and I am trying to figure out how to add the 4th button to my arcade cabinet. I have a standard 6 button layout(street fighter style). I noticed that the MVS system doesnt have an auxillary harness, so I am having trouble findout out where does this button go wired to on the jamma harness?? All I have now is 3 functional buttons. Anyone know how i can fix this?? Any feedback would help alot!

Thanks

Jesse