The first thing to check then is how far the oil as made it along the loom. Find the ECU under the drivers seat and pull off the red plug (releasing small lock tab first). If theres no oil, just change the injector harness and cam cover gasket. If there is oil but the engine is running fine, clean up the connector using solvent spray (its possible to remove the white locking plate to help) as well as changing the injector harness. Make sure the loom is genuine part. If the engine is miss firing then it's possible to stand the ECU up and try and drain it, or if you're feeling bold dismantle it and clean it up, but the risk is yours.