I looked at the wiring diagram and the brown/green wire goes from the oil pressure switch, through one of the 12 pin multiconnectors on the inner wing neer the coil to the oil pressure light in the dashboard. The other wire on the oil pressure switch, the brown/red one also goes through the 12 pin multiconnector to the oil pressure gauge.
However i can not tell you witch way around they fit on to the actual oil pressure switch. hope this helps?