RV Pigtails 20055 7-Way Male To Dual 7-Way Female Blade Adapter, 14"

This is a 7-way male to dual 7-way female blade adapter at 14 inches. It splits a single 7-way connection into two. Most commonly used for truck camper and trailer combinations — your truck has one 7-way receptacle, but you need to run electrical to both a camper and a trailer. Plug this into your truck, then plug both the camper and trailer into the two female outputs.