Just went out to the green turd to see how it's horns are wired up to the relay. To simplify the explanation, if the relay is positioned with the 3 terminals facing down, the positive wires from the two horns are fastened to the left terminal, main power (mine from the starter's positive terminal) wire connected to the middle terminal of the relay. The wire from the horn button (from steering column) connected to the right relay terminal. Again this is with the 3 relay terminals facing downward.

Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.