If you use Modchip, it is easier to install.
You need to mod both Power Board and Drive Board.
If not, you can check here :
Drive PCB mod :
1) Modchip pins don’t touch anything from PCB.
2) Drive PCB need to cut two wires and solder 8 wires to the Modchip.
Power Board v05 Mod :
Cut two wires and solder two wires.