Vicram

I have seen conversations about p38 gearbox also a have the same problem I use p38 rover but I design in other way using different kind of computer to control the engine I get stuck on how I can bypass the gearbox because in the gearbox there two wire for high and low and other four wire small how may I do to use this gearbox to run well pls help me. This below is the wire come from transfer box and motor also I try to connect with it's own ECU I get only sign from level display mode.