I'm really close to having this thing put back together, but I think I'm
missing one more part.  If anybody out there could help me out I would be
eternally grateful!

I've replaced my O-Rings, my dryer and my compressor.  I'm ready to hook
everything up and take it to pull vacuum and charge it, but I don't see how
or where they will be able to tap into the system to charge it.  My system
is not stock. The two hoses in my engine compartment end with a
threaded/flared connection that would happily screw right onto my new
compressor. Only problem is that there is no one way valve to hook up to
the refrigerant machine.

Here's what I have:
https://lh3.googleusercontent.com/-oX2LsNl_v9c/VVEYkZRdyZI/AAAAAAAALzo/CMKGbGGP3-k/w362-h644-no/20150511_163429.jpg

And here's what I'm guessing I should have:
http://images.thesamba.com/vw/gallery/pix/1207842.jpg

Anybody know if there's some kind of adapter that would screw in between my
threaded hose ends and the compressor that would have this valve on it?

--
m.