Trailer Truck 13 Pin To 7 Pin Plug Tow Bar Socket Adapter Converter 2.8*2.6*2 In | eBay
Anyone with Thule tow-bar bike rack? Check this plug pic | EMTB Forums
Socket Adapter Towbar 13-polig Car On 7-polig for audi Q2 Q3 Q5 Q7 | eBay
Waterproof 13 To 7 Pin Plug Trailer Truck Electric Adapter Towbar Towing Socket - Trailer Couplings & Accessories - AliExpress
Amazon.com: WESTFALIA Automotive Adaptor 7-pin to 13-pin to Connect 7pin Socket on The Vehicle to 13pin Socket on The Trailer or Bike Carrier : Automotive
Buy Thule 13 to 7 Pin Tow Bar Electrics Adapter | Goode Leisure