The HPA-1 antenna is designed to mount inside your vehicle when you are not using a traditional fender mount antenna. Place the main body of the HPA-1 as high in the dash as possible. Avoid placing it near any high-current Ground the main body of the HPA-1 to a clean metal point close to the HPA-1 body via the small braided Route the antenna cable with the thin black power wire to your radio location. Connect the thin black wire to a 12 volt ignition source or the blue power antenna output wire of your RetroSound® radio. Connect the male antenna plug into the female antenna receptacle of your radio.