i was using the commodore as an example not implying it was the only car thet needs to be grounded.
there is no spare wire to leave hanging. there is one plug from the car which plugs into the wiring for the bosskit that goes to one spade bit on the horn button. there is another wire handing off the side of the new plug which goes to the horn button. would that be the ground now and i just leave the other spade bit on the horn button with nothing connected?
id test it but i dont have a fuse connected to the horn in the fuse box so i dunno if its right