Hey guys, I recently purchased a second hand Vauxhall corsa, and was in the middle of changing my head unit to a pioneer SPH Da120 which made me confused! There was 3 cables which came out of the Cd40, which the pioneer could only input 2 of them. I’m not sure wether I was doing anything wrong, but the cable type is a mini type b and I’m clueless to its function in the car?! Does anyone know what this cable is for and is it important?!