Rover owners: Connector, where does it connect???

Hi,

my car returned from a mechanic(R75 2.5V6), but I found in the engine area a connector that is not connected. I have looked eeevrywhere but couldn't find a place where to connect It. The OBD doesn't show anything. It is somewhere between belts/alternator and chassis and is about 20-30cm long.

It's a connector with a metal clip - 4 wires go there - brown, brown/white, brown/blue and black. Any idea where should it be connected? Tryed Haynes manual but couldn't find anything about it.

Could anybody just open the bonnet and look where does it go please ? Or just take a picture? Thanks a lot.