VLC2270 13 pin plastic plug
12 volt 13 Pin Plastic Plug.
More recently found on European towbar electrics the 13 pin plug can combine black 12N lighting and grey 12S supplemental power plugs.
Benefits include waterproof when connected, connections are electro-plated helping corrosion resistance,
coupled by a positive twist lock and each pin can carry up to 25 amps.