There's only four pieces to it. There's the "double threaded nozzle thingy," two washers (either copper or higher quality), and a nut. I think it is impossible to put it together wrong -- there's just no way to do it wrong. It's easier if you have it out of the car and are not hunched over the fender well trying to herniate a disc, though. Here's a PDF that might help you:
http://www.mossmotors.com/graphics/p...DF/582-976.pdf