WOLO air horn wiring

I have a WOLO air horn and was wondering how to wire up the compressor to a switch. 
 
I made a diagram using MS paint, you can add to it and help me wire this thing up. 
 
Last time I had this, i just cut the stock Subaru Legacy horn wires and wired it up there, but I dont think thats going to work here. 
 
[IMG]http://i4.photobucket.com/albums/y104/Pongpagong/wiringdiagram.jpg[/IMG]