MECMO Heavy Duty 7 Way Plug Inline Trailer Cord w/ 7 Gang Junction Box Waterproof, for Rewiring RV or Trailer to 7-Way Connector, Transparent Surface, Yellow (8 Feet) - Walmart.com
ILSSLI Junction Box Outdoor Waterproof IP68 Electrical Cable Connector 2 Way M20 Plug Wire Range 5 to 12mm External Cord Boxes 2 pcs - Amazon.com
Superior Electric RVA1564 7-Way Trailer RV Truck Cord & Plug with 7-Pole Wiring Junction Box – 4ft Cable
What Is an Electrical Junction Box and What Does It Do? | JDM Electrical Contractors
IP66 Waterproof Junction Boxes, 3 Way Cable Connector with Terminals Strip, Screw and PG9 Waterproof Vonnector for Indoor and Outdoor 4-8 mm Cables (White) - Walmart.com
FX Junction Box Waterproof IP68 2 Way Plug Line M20 Coaxial Cable Connector Wire Range 5 to 12mm Outdoor External Electric Power Cord Boxes: Amazon.com: Tools & Home Improvement