The pre-wired brake connector is above the OBD port on your 92A. The dealer can hook up your controller, if the dealer doesn't have an Audi dealer with them it can be tough to get the connector housing and pins, as they need to be sourced from VW usually, but it can still be soldered in without a connector. The "connector" that some people think should come with their vehicle is actually a European 7 pin to US 7 pin receptacle that screws into the hitch. This needs to be bought and installed at the time of delivery, as it is purchased through Westfalia USA. Most dealers will stock it, or can get it the next day. For what ever reason VW does not ship Tauregs and Cayenne's with a country specific 7 pin connector, but it's simply 4 screws, and replaces a blank cover. If you see salt or weather use stainless hardware, anti-sieze and dielectric grease liberally on the screws and body side connector, and inside the 7 pin connector under the cover, as the pins corrode easily and may need replacement more than once if used heavily, this will save a lot of headache versus broken screws and annoying trailer lighting warnings. And contrary to what some posts say, we know plenty about towing....
Sent from under the bonnet of some rich guys Porsche