Review on 🚗 CURT 57672 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter - Black by Richard Counts

This has a FATAL design flaw. The floor doubles with the factory floor at level 4, and the additional floor you screw into the chassis is smaller. All they had to do was leave the small factory ground on the 4 pin connector unconnected to the 7 pin connector and make a ground for the 7 pin cable the same gauge as the charge and brake cables. If the extra small bottom is not fully secured or loosened, all the power for the charging cable, brakes, reversing lights and standard brake lights will be fed back through the regular bottom, which is very bad.