Looking for 12v power for your Bluetooth or dashcam? I’ve connected mine to the vanity mirror lights in the sun visor? Uses far less power than the 2 incandescent lights. In our car it is switched with the ignition – not the accessories somehow. Just need to plug before the light on/off switch. So no wires from the top of the windscreen to the cigarette lighter. Not recommended for your HF rig.