No, I didn't take any photos, sorry.
I dismantled the cigarette lighter to expose the printed circuit, soldered the wire to the terminals, reassembled most of the lighter, leaving out the metal parts which were no longer of any use. I then wrapped the whole thing in bubble wrap and insulating tape, and wedged it inside the fuse box. I suppose it sounds a bit amateurish, but it wasn't in reality. I took my time and everything has worked fine so far.