How does the steering wheel horn button mount?

[Mister-B]

I just replaced my steering wheel with a different stock one, and I can't figure out how to put the internal horn parts back together so the horn works? There's a backing plate with 3 holes and some slits, a cup shaped metal piece, a plastic disc and 3 screws. There's this spring mounted pin that pokes up through the steering wheel. I think this is for the horn. I just can't figure out exactly how to mount it up so the horn will honk? I know as I try to figure it out, the horn honks like crazy lol
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