I already got the DME/ECU connected to the engine with the wiring harness. My problem is the wiring harness that remained in the chassis after removing the old engine (This wiring harness extends from the engine compartment to the inside of the vehicle behind the dashboard). This wiring was connected to the old engine through a connector. Now the engine side wiring is equipped with a different connector (plug) as I showed in the pictures. So are you saying that I have to remove the wiring harness from the vehicle and get another one to fit that of the engine? Anyway, I will get some detailed photos of what I have at hand to better assess. Thanks again..