I should have indicated that I am using Town and Country horns. There is a relay mounted on the bracket with those horns. The original single horn does not use a relay, as far as I know. Both types came in the parts pile from the previous owner.

Dave, the wire size noted in your reply is what it appears this one would have when done. I am uncertain I've got this right though and that's why I am asking. The mast bearing was replaced with a NOS that didn't have a wire attached. I soldered a 16 gauge wire to it using the old mast bearing as an example.

Thanks