I want to replace my tremolo with a better quality Gotoh setup. On my old, el chepo tremolo, there is a yellow wire coming from a hole bored in the rear cavity (just behind the rear of the middle PUP I'd guess) and it has been crudely soldered to the upper side of that angled bracket that screws into the body that the springs attach to. An earth wire for something I guess, but is that normal ? Do I just re-solder it back to the new bracket the same way? Cheers, Paul.