I tried to hardwire my dash cam. I bought a add a circuit and got the original cable that came with it the one you conect to the cigarette lighter and cut it and it had 2 wires a red and black. I connected the red to the add a circuit and the black to bolt but the camera won't turn on. I then took the add a circuit off and tried connecting it directly to the battery (red positive black negative) and still nothing. But If I connect the camera to the wall outlet with a usb cord provided it turns on. What am I doing wrong?