BTF-LIGHTING 4 Pin Electrical Metal nut Connector 22AWG IP68 Male Female Connector 7.87in/20cm Extension Cable for Car,Truck,Boat,Indoor/Outdoor LED Strip Lights/String 15mm Metal Nut Small Size - - Amazon.com
2Pcs IP68 Waterproof Electrical Junction Box Outdoor Underground Wire Connector Junction Boxes for 2 or 3 Pin Cables Range for 3-10MM, 6-11MM, Coupler for 0.5-2.5MM - - Amazon.com
YETOR Waterproof Connectors 2 Wire, 16AWG Male Female Plug LED Connector with 2Pin Waterproof Connectors,IP68 20CM Extension Cable for Car, Truck, Boat,Indoor/Outdoor LED Strip Lights,(5Pairs) - - Amazon.com
3Pin Waterproof Junction Box Connector Electric Cable Inline Wire Slim Plug IP68 For Solar Panel System Outdoor LED Lamp Electrical Wire Connecting - - Amazon.com