13 pin plug (car) to Twin 7 pin N & S Type Socket (trailer / caravan). 1 x Conversion Adaptor without cable. Plug and play design, insert into socket, twist and lock, no need to change any cable. Make vehicle and caravan/trailer electrics compatible when towing.
eBay
AU16-Trailer Extension Adapter 13-Pin To 7-Pin N And S Extension Cord Adapter Trailer Plug With Cover
Aliexpress UK
EASY TO USE - The simple design of the adapter makes it easy to use, and it can be quickly and easily plugged into your vehicle's socket and your trailer's plug.
eBay
SATA Cooler Fan Adapter Cable，15 Pin SATA to 4 x 3 pin / 4 pin Fan Splitter Cable,15 Pin Male SATA to 3 Pin or 4 Pin Computer
Aliexpress UK
The adaptor converts 13 pin to 7 pin towing electrics, making it suitable for a wide range of towing applications. The adaptor is also suitable for use with tow bar electrics, making it a versatile and essential tool for any caravan or trailer owner.
eBay
5 Pin XLR To 3 Pin DMX Metal Converter Audio-Lighting Adapter 3-Pin Male To 5 Pin Female 3 Pin Female To 5 Pin Male Connect
Aliexpress UK
The Maypole MP602 7 Pin to 13 Pin Caravan Adaptor Lead is a 450mm long cable specifically designed for cars with a 7 pin connector to convert to a 13 pin connector. The adaptor lead allows for seamless connection between the two types of connectors, providing convenience and flexibility for car users.
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Gangbei-Waterproof Cable Connector, Fixed Butt Screw Connection, 32mm, LD32, 3 Pin, 4 Pin, 5 Pin, 7 Pin, 9 Pin, 11 Pin,M32, IP68
Aliexpress UK
GADLANE 7 Pin to 13 Pin Plug Socket Adapter To create a secure connection between your vehicle and trailer, investing in this 7 pin to 13 pin trailer plug is critical. Designed to fit trailers, caravans, trucks, and towbar sockets, this plug adapter is up for the task.
eBay
SATA 13 Pin to 22 PIN Convert Cable CD Drive Hard Disk SSD Power Data Wire 7+15 Female to 7+6 Male 22 Pin Male to 13Pin Male Ada
Aliexpress UK
Suitable for all European standard trailers. Establishes a secure connection between your major vehicle and the additional trailer. Transfers the electronic signal lights from the vehicle to trailer. Converts the 7-pin male socket to the 13-pin female socket on your trailer. Slim line design: same diameter as a normal trailer plug and just over half the length. Excellent quality black plastic housing helps prevent rusting. Simple to fit. Waterproof for all road and weather conditions. Carries the European CE mark of approval, do NOT buy adaptors unless they have this endorsement.
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20cm PCIe 6 Pin To 8 Pin Power Adapter Cable 6 Pin To 8 Pin PCIe Power Cord For PCI-e Video Cards Power Extension Cable Adapter
Aliexpress UK
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
[B63C] Cooling Fan Adapter Cable, 15 Pin SATA to 4 x 3 Pin / 4 Pin PMW 12V PC Case Fan Power Adapter Cable to 15 Pin SATA
Aliexpress UK
7 Pin to 13 Pin Adaptor 2x Vehicle to Trailer Caravan 12V Plug Socket Adapter. 7 Pin to 13 Pin Adaptor Vehicle to Trailer Caravan 12V Plug Socket Adapter Brass. 7 Pin to 13 Pin Adaptor 2x Professional Vehicle to Trailer Caravan Socket Plug.
eBay
12V 7 To 13 Pin Towing Socket Converter Adapter Electric Socket Adapter Plug Converter Durable Socket Converter
Aliexpress UK