How the F* does the steering wheel go back together?

[kcackler]

OK, so I finally got around to putting in my new used steering wheel tonight but I'm having some serious problems with the horn. When I was taking the old wheel off, the horn plunger popped out of the wheel, along with (I think) a small nut looking thing. Though with all of the crap in my floor, I'm not sure that nut looking thing came out of the wheel.

So I'm trying to fit the horn components back together and I'm running into a heck of a time. Here's how I THINK it goes back together:

Spring sits in green sleeve.
Plunger sits, head down, on top of spring
Flat metal ring sits inside steering wheel and holds plunger on top of spring
Deep metal ring fits on top of that and screws into wheel
Center cap sits on top of that

The problem is that the goes off non stop when I put it together like that. Am I missing a piece or am I just trying to put it together the wrong way?

Tips or pictures are appreciated here...