Putting the horn back together

[snowblind]

I'm putting my horn back together but can't remember exactly how the parts go, like a fool! Got the silver tray the horn sits in, three screws with springs and a horseshoe shape plastic bit with three holes, if someone could remind me please.

 

[Araon]

springs on holes horseshoe on springs silver ring on horseshoe screws through all cap and spring on top