Hey, I think I've sorted it out. There is a hole next to the wire to the hub. The spade connector is invisible deep in the hole.
I kept searching for pictures, and found one from biketouringnews.com that shows the tail light connections. It doesn't mention the connections, but you can see them if you look carefully. In case anyone else is interested, here is a link (that I hope works):
http://biketouringnews.com/wp-conten.../P21432171.jpg
That looks correct and is exactly as my tail light is hooked up to the Edelux on my 3 bikes.
You can get a prefabricated cable, which already has the connectors crimped on and you only need to lengthen and crimp the cable to fit the tail light position.