Fangrui Product Details Installation Instructions: Mount The Remote Charging Post Through The Body Panel To Access The Battery Terminals And Charge The Battery Quickly And Easily. Simply Mount The Posts Through A 1/4in Hole, Black Connects To The Negative, Red Connects To The Positive, Convenient And Practical. Direct Installation, No Complicated Tools Required, Greatly Save Your Valuable Time. Mount The Remote Charging Station Through The Body Panel To Access The Battery Terminals And Charge The Battery Quickly And Easily. Insulated Dust Cap Is Color Coded To Safety And Prevent Crossed Cables, And Prevent Some Accidental Contact When Not In Use. Built To Meet Standard Specification, Strictly Follows The Factory Quality Control. Applicable Models: Suitable For Cars, Trucks, Boats, All-terrain Vehicles, Etc. Installation Role: Battery Charger Posts Are Sold Individually Or In Pairs, 3/8inch Brass Studs. Mount The Remote Charging Station Through The Body Panel To Access The Battery Terminals And Charge The Battery