Towbar wiring diagrams

[steviemac]

Morning all, I've just ordered a towbar for my 03 TDi, AVB. I would appreciate any info anyone could supply on wiring both the 12N socket (lighting, etc) and the 12S socket (power to caravan fridge, charging, etc). Diagrams would be preferable if poss.

I've tried Google, etc and should be able to wing the 12N, but can't find any specific info for 12S connections to Passat.

Thanks in advance