My WB diagrams show 2 x plugs with dark green and dark blue wires. One is for emissions and the other is for the washer pump motor. Using guesstimate as a line of thought, could these spares be for the old Lucas washer pump that was mounted on the wiper motor? My reasoning is that the location would be close to where the plug is described in the first post and secondly (this next part is a guess) Holden may have opted to leave the older wires (with same colour coding) in the harness so that both types of washer pumps could be installed?