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
1/3/5/10pcs Practical Electronics New Charger AU Plug Adapter Cell Phones 2.1A Dual Port Power Plug Standard Wall Adapter
Aliexpress UK
Heavy Duty Electric Trailer Towing Plug Wiring 12V 7 Pin Connector Socket Towbar. - Supplies power to your caravan, towing and truck. - This adapter converts the 7-pin socket on your car to the 13-pin female socket.
eBay
220V to for DC 12V Adapter Car Cigarette Converter Socket Safe Power Plug 6W Wall Plug Adapter
Aliexpress UK
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. Used on newer cars with a 13 pin plug on the towbar.
eBay
XLR Cable Microphone Lead Male To Female Line Stereo Audio Adapter Plugs BU Cable Cord 0.3M 8M 1M 30M Audio Adapter Plugs BU
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
Audio Jack Adapter 6.35mm TS/TRS 1/4 Male(Female) Plug RCA Male(Female) To XLR Male(Female) Plug Audio Adapter
Aliexpress UK
【Easy to install】The simple design of the adapter makes it easy to use. Plug this little adapter into the 7 pin plug and then plug in your standard 13 pin into the other side. Fix the position on both sides of the adaptor and install it in the correct way.
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China CN Japan JP US Plug Adapter European EU To US American Chinese Japan Travel Adapter Electrical Plug Power Sockets Outlet
Aliexpress UK
Description: Suitable for European standard trailer. Supplies power to your caravan, towing and truck. Converts the 13-pin socket on your car to the 7-pin female socket. Establishes a secure connection between your major vehicle and the additional trailer; Transfers the electronic signal lights from the vehicle to trailer. Weather proof sprung locking flap protects the connections when not in use and locks in the 7 pin plug when in use. .
eBay
Eu AC Power Adapter Socket 16A 250V Connector Cable Electrical Plug White Black Male Converter Adaptor Detachable Plug
Aliexpress UK
Towing Electrics. Mitsubishi L200 Series 5 Plug N Play Wiring Kit For Towing Electrics. Towing Electrics£70-100. The Mitsubishi L200 Series 5 plug and play wiring kit makes wiring the tow bar socket installation easy, using multi-plug connections that connect directly to the OE wiring on the vehicle.
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1pcs EU Plug Adapter 16A 10A UK to EU Travel Adapter Converter 2 Round Socket Universal Euro To UK AC Wall Socket Plug 4.0mm
Aliexpress UK
The cross-shaped slotted copper needle is matched with the female needle. PIN 1 - Yellow Wire (Left/Hand Direction Indicator left turn signal display). 1 x 7-13 Pin trailer cable Lead. 7 PinRound Socket.
eBay
TEUCER 24P-6 ATX 24 Pin to 90 Degree Power Plug Adapter 5V/3Pin ARGB Plug Adapter Modular DIY Mounting Accessessory
Aliexpress UK