Toyota Repair: 1994 Land Cruiser Oil Sensor, oil pressure gauge, oil pressure sending unit

Question
Just had an AC compressor put in and they seem to have disconnected some wiring to the adjacent oil pressure sensor. I can see a white wire that seems to have been cut or pulled out but can't figure where it was previously connected. Of course the shop is not open until Monday and will probably deny they did it anyhow! A wiring diagram would be great!

Answer
I can't help until monday either, don't have access to a wiring diagram at this time.
Does the oil pressure gauge work?  The wire may be for something else.
The oil pressure sending unit is on the engine block towards the front, it may have a black rubber cover on it, remove the cover and see if the wire is connected to it.