I've just fitted a split charger relay and a 12s socket. I connected the sensor wire to the alternator warning light wire. The light does not now go out, so I have temporarily disconnected it. Whilst chatting to a chum about it, he told me I've put the relay in the wrong place anyway- the rear of the vehicle. He reckons it should be at the front, as the volt drop will be too low to make it work properly. Who is right?