Amazon.com: Laisomeke 4 Pin electrical Connector Waterproof Connector,Male and Female Way 16 AWG Wire Suitable for car Truck, Boat and Other Wire Connection (5 pack) Black : Automotive
1 Kit 4 Pin Way Electrical Wire Connector Plug Set auto connectors with cable/total length 21CM - AliExpress
CIC-4 Cable Interlock Connector, 4-pin
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 :
XALXMAW 10Pcs Lever Wire Connectors, 1 in 4 Out DIY Mini Quick Terminal Block Compact Splice Electrical Connectors, 24-12 AWG: Amazon.com: Industrial & Scientific
TowSmart 12 in., 4-Way Flat Trailer Wiring Connector 1441 - The Home Depot
IDEAL 34 Yellow In-Sure 4-Port Connector (100-Pack) 30-1034P - The Home Depot
Automotive Pigtails / Sockets
Reese Insta-Plug Kit 4 Wire Flat in the Trailer Parts & Accessories department at Lowes.com
1 Kit 4 Pin Way Electrical Wire Connector Plug Set auto connectors with cable/total length 21CM - In1mall
Amazon.com: Ideal In-Sure 30-1034P 34 Yellow Non-Twist 4 Port Connector for Solid, Stranded, and Tin Bonded Wire (100 Pack) : Tools & Home Improvement
Hopkins 48205 48" 4-Wire Flat Connector Set with Splice Connectors - Walmart.com
4 Terminal Electrical Wiring Harness Electrical Connector for Vintage Honda Motorcycles| Common Motor Collective
Quick Wiring Cable Connector 2 in 4 out Splicing Connector | GKEEMARS