CURT Replacement 7-Pin RV Blade 7-Way Trailer Wiring Harness Plug, 6-Foot Blunt-Cut Wires, Boxed Model 56621CURT Replacement 7 Pin RV Blade 7 Way Trailer Wiring Harness Plug, 6 Foot Blunt Cut Wires, Boxed Model 56621 Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable