I believe it was an Autoleads part (autoleads.co.uk). He did mention something about having to move 2 pins on the connector (from rear to front or something?) with a small pair of pliers, but I can't remember the exact details.

The summary was that he didn't modify any of the car's wiring (and didn't even push out the tabs on the docking sled - the sled was a good friction-fit) - he had to leave it all as-is as the car was a lease.

Hugo