Weather proof sprung locking flap, protects the connections when not in use and locks in the 7 pin plug, when in use. The 13 pin side fits and locks in on the existing fitting plug on the car - complete with weather sealing rubber 0-ring.
eBay
1pc DIN 7 Pin Din MIDI Male Plug To 3.5mm 1/8" Male Stereo Jack Audio Adapter Connector Cable for Bang & Olufsen B&O Naim Quad S
Aliexpress UK
13 pin plug (car) to Twin 7 pin N & S Type Socket (trailer / caravan). Brass electric shock: brass is used as a conductor, which is more conductive than ordinary materials. Plug and play design, insert into socket, twist and lock, no need to change any cable.
eBay
XH 2.54mm Connector Kit With pre-crimped cable wire 2/3/4/5/6/7/8/9/10 Pin Housing JST Adapter Cable Compatible with JST-XH
Aliexpress UK
Model type: Plastic mini adaptor block with cap. For the connection of a trailer equipped with a 7 Pin 12N plug to a towing vehicle equipped with a 13 pin socket. To convert a 13 Pin socket into a 12N 7 Pin socket.
eBay
Ugreen USB to RS232 COM Port Serial PDA 9 DB9 Pin Cable Adapter Prolific pl2303 for Windows 7 8.1 XP Vista Mac OS USB RS232 COM
Aliexpress UK
Waterproof 13 To 7 Pin Plug Trailer Caravan Electric Adapter Socket Connector. Converts the 13-pin socket on your car to the 7-pin female socket. Plug this little adapter into the 13 pin plug and then plug in your standard 7 pin.
eBay
2.54mm XH Connector Socket Kit with Pre-Crimped Cable Wire 2/3/4/5/6/7 Pin Housing JST Adapter Cable Male and Female Compatible
Aliexpress UK
This adapter converts the 7-pin socket on your car to the 13-pin female socket. 7 PIN TO 13PIN ADAPTER. Pin Car to 13 Pin Caravan/Trailer, (6005). High-Quality Towing Adapter 7. YOUR CAR HAVE 7 PIN SOCKET BUT TRAILER 13 PIN SOCKET?.
eBay
ZH 1.5MM Double JST Connectors and 28AWG Pre-Crimped Silicone Cables kit with 2/3/4/5/6/7/8/9/10 Pin Housing Adapter Cable
Aliexpress UK
This adapter converts the 7-pin socket on your car to the 13-pin female socket. 7 PIN TO 13PIN ADAPTER. Pin Car to 13 Pin Caravan/Trailer, (6005). High-Quality Towing Adapter 7. told you they’ve accepted it (having had enough opportunity to inspect the item before confirming they’ve received it).
eBay
1.8" ZIF/LIF CE HDD Hard Disk Drive SSD to 7+15 22 Pin SATA Adapter Converter
Aliexpress UK
2pcs of 7 to 13Pin Towing Socket Converter. - This adapter converts the 7-pin socket on your car to the 13-pin female socket. - Supplies power to your caravan, towing and truck.
eBay
JCD 1-10PCS DIN Audio Adapter 3/4/5/6/7/8 Pin DIN Male Female Plug with Plastic Handle Socket Panel Mount Chassis Connector
Aliexpress UK
Ideal for car trailers, caravan, caravan, bicycle carrier etc. 【Universally usable】 Ideal for car trailers, caravan, caravan, bicycle carrier, turn signals left, turn signal right, driving / tail light left, driving / tail light right, rear fog lamp, brake light, reversing light.
eBay
USB Triple SFC/NES/MD Controller To USB-C Interface Adapter 3D Printed Housing 7-Pin Controller Interface
Aliexpress UK