body harness's are the same, he only needs to remove the pass side kick panel and remove the ucu, then move the harness from the engine to the ecu.
however I cant remember where the wires connect to that engine harness for the gauges 
i'll look at mine when i get home tonight, but if i remember right, the engine harness has 3 plugs, 2 of which plug into the ecu, and the the third plugs into the body harness, then another plug from the body harness plugs into the ecu also. i'll check though, i might be wrong
