unit recovered from wrecked vehicle. curious as to the functions of the unused wiring. unit has an add on central locking unit main unit has : a three pin connector (for above mentined add on module) the main 12 pin connector,a 2pin (white) connector and a 2 pin (blue) connector. also,on the side of the main unit, are two 6,3mm male connectors(relay output) any help would be appreciated.