505 Wagon trailer electrics

My "new" 505sLi came with a tow bar, but no electrical socket.

Anyone have favourite places for connecting the relevant wiring? I notice that there is a cut off harness under the bumper bar, but I haven't traced it yet to see where (or whether) it is is hooked up to the relevant circuits.

Cheers

Rod

rod pick up your power from the o/s/r inner gaurd area,next to the jack cavity the wiring runs up that panel.run a n/s indicator wire under your boot matt to joint the o/s loom.good luck,may the power be with you.