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
Trailer Truck 13 Pin To 7 Pin Plug Tow Bar Socket Adapter Converter 2.8*2.6*2 In | eBay
Adapter 7/13 Stecker 7pin / Dose 13pin 0,5m
CARROFIX American RV Style 7-Way Connector to European 13-Pin Plug - US Vehicle 7-Way Blade to EU 13-Pin Round Trailer Light Converter