Joining cables with a TEETUBE IP68 waterproof connector system. - YouTube
YETOR Waterproof Connectors, Male Female Plug LED Connector with 3Pin 3Core Waterproof IP68 Connectors 16AWG 20CM Extension Cable for Car, Truck, Boat,Indoor/Outdoor LED Strip Lights,(5Pairs) : Amazon.co.uk: Electronics & Photo
EasyFit 12V Garden Lights - 10M Main Cable with 4 Connectors - Lighting Direct
Techmar Connector SPT-1W SPT-1W (2 Pack)
SUNVIE 12W Low Voltage LED Landscape Lights with Connectors, Outdoor 12V Super Warm White (900LM) Waterproof Garden Pathway Lights Wall Tree Flag Spotlights with Spike Stand (10 Pack with Connector) : Amazon.co.uk: