Evidently wires head towards it from the passenger door and from the wire bundle by the handbrake. Does anyone who's had the carpets up in the front recently rembember the cable routes between those areas and where this point may be?
Problem is the lights, power and common wires going to my cigar socket are one molten bundle. I've replaced the power cable with another bit of wire (cut the original wire from fuse box output and replaced). The Earth wire (common) is somewhat ruined and I really want to take the whole melted mess out and replace it neatly.
I'm hoping that when I start to lift the front passenger carpet all will be revealed but these things never seem to go quite so well as hoped.

This is related to my headlight aim adjust issue (i think) which I am posting about seperatly...