Well, hopefully somebody will have a better explanation with drawings or images but I'll give it a go. You have a horn button retainer which is a spring retainer that the horn button snaps on to. It as I recall is held in place by the steering shaft nut. This retainer will be a two-piece affair and if working correctly the spring ring will be insulated from the center section (which is what the shaft nut holds in place). It rocks on 3 points to make contact. Then there is a horn contact bushing with spring inside. This allows electrical contact no matter where the steering wheel is located in the circle of turn and it fits through the hub of the steering wheel. The horn button retainer I mentioned first sits on top of that contact spring & bushing and this makes contact with the outer ring of your upper bearing of your steering shaft which is connected to a wire running down inside your steering mast (column) and coming out about halfway down. That spring / bushing will have a plastic piece which insulates it. So, if you were looking at an exploded diagram (and believe me if I had one I'd send it), you will see your steering shaft/mast assembly in which there is a copper or brass ring for contact with the bushing/contact spring, the bushing/contact spring, the steering wheel, the horn button retainer and the horn button.
Once you get all this (and it is really easy once you see the pieces), the wire goes off to the horn relay. This wire is what pulls the relay in to switch the voltage & current you need to honk your horn.
After you get past the horn button stuff, you should be good to go.
Good luck!
Jon
