I am in the process of installing the MAD electric "new system". I have one of Mark's terminal blocks mounted to the firewall and one on the radiator support. I am no longer using the horn relay as a buss bar. The horn relay will be used just to operate the horn and the key buzzer. Can I just run a wire from the MAD terminal block to the left post of the horn relay to power the horns? If so what gauge wire should I be using?