If you have ever played any of the King of Fighters series of fighting games on a Neo Geo MVS arcade machine you will have noticed the odd button configuration compared to fighting games made by Capcom. The button are configured in this order light punch, light kick, strong punch, strong kick. This is uncomfortable for me, so I made this cable so I could easily swap the B and C buttons.
It is a very simple cable that uses a double pole, double throw toggle switch. to make it work, I soldered a X crossover wires on the outside poles.