horn button help please

It should honk until you attach the spring over the Nut & bolt (tape on the spring will help hold the spring in place) then place the cap over the spring and push down over the collar with the wire tab (cap has 3 or 4 indentations and collar with tab has matching holes) then gently insert cap and twist a little. The cap will depress the spring and hold the collar away from the steering wheel assembly until you depress it - and the horn will blow.