ah right, sorry the blue wire i refered to is the thin green/yellow on yours then, BE VERY CAREFUL where you put those red wires they connect to an unfused supply from the battery (very dangerous if you connect it wrong).

The red ones should be joined together in the same connector (unless theyve been replaced) and should both run to the starter motor, on the same connector as the main battery lead, the green/yellow is the wire you need to be looking at, can you get me a picture of it from above/underneath, i can more than likely help you then