This mod allows the Mayflash adapter to output 5v using only one USB cable. This is mostly meant for one player setups, or if you are using controllers without rumble.
All you need to do is bridge the first and last pin using a hookup wire. In the picture the 2nd and 3rd ground pins are also bridged using solder, but this is not needed as they are bridged via the PCB.
When using this mod over USB 2.0 a total of 500ma should not be exceeded. This mod should not be used at tournaments and are only for home setups.