Thank you all for the nice comments.
I have been working on wiring everything up and ran into a surprise yesterday when after the wiring was done and the bike was started to find that when ever I pushed the horn button the head light would go out.
Long story made short even though the magneto that came with the light package from Phantom Bikes is 12v it did not have enough amps to power the horn. I'm going to have to buy a battery. Going with a Phantom # APP-09BS12 at techbatterysolutions.com . It's diam. L 4.5", W 2.28", H 3.5" and weighs 1.2 lbs.
I meet another motorized bicycle owner that has a Phantom bike in MD here on the forum (jhammondcpa's) and we both have been working on horn installs. We both came to the same conclusion and will be buying the battery. Jimmy found the battery after we both realize that was the only way to have a horn. Jimmy found it and thought it would work well. Will most likely mount it on top of the rack in a top rack bag.
While I was working on the wiring. I added wires for a rear tail light. I'm thinkng of going with a yellow tail light. I had seen some LED truck and trailer lighs on a display board in Napa and found one that I really liked. Think it's a trailer side marker and is about 1- 1/2" tall and 4.5" to 5" long.
Sorry for mis leading everyone but I really thought it would work.
Engine flywheel cover is off yet from the re-wiring in the picture below.