CURT 4-Way Flat Connector Plug with 12" Wires (Trailer Side) 58030 - The Home Depot
Wire Connectors 4 way - 4 pin housing and spade electrical connector plug solder | eBay
Electronic Connector | Auto Alternator Plug | Car Steering System | Wiring Harness - 4 Pin - Aliexpress
Amazon.com: TOMALL 4 Pin Way 18 AWG Waterproof Connector for Electrical Quick Plug socket 4 Wire Pigtail 1.5mm Series (Pack of 4) : Automotive
Amazon.com: Nilight 4Pin Way Electrical Wire Connector 10 Pack 16AWG Male Female Plug Socket Quick Disconnect Waterproof Plug Play 1.5mm Series Terminal for Car Truck Motorcycle Marine Boat, 2 Years Warranty :
4-Way Flat Trailer Connectors
CURT 4-Way Flat Connector Plug with 48" Wires (Trailer Side, Packaged) 58348 - The Home Depot