I used part number H21-086 from Dennis Kirk (www.denniskirk.com).
Good question about the touring windshield. I didn't try it. It doesn't matter anyway because I think I'm going to do away with the touring shield. The top of the shiled hits me right at eye level. I'm always either ducking down to see under it or craning to see over it. It just gets my a$$.
I ran the wires down through the bottom of the instrument clam and along the back of the triple tree. It looks very neat. Only a few inches of wire show. BTW I didn't know Steve sold these or I would have gotten them from him - sorry about that Steve.