Amazon.com: SP21 3 pin Waterproof Heavy Connector, 2Screw Panel Fix Socket LED Power Cable Plug High Voltage Bulkhead Heavy Connector(3pin) : Tools & Home Improvement
JST SH 1mm Pitch 3 Pin to Socket Headers Cable - 100mm long : ID 5765 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits