Well made good progress today. I watched an YouTube and identified the colors of the wires to the unused OEM amber front turn signal lights.
t=260s
This guy also said the white plug I asked about was hot all the time. SO, I used that to power the horn. I removed the positive wire from the plug and soldered my horn power lead to it. So getting the horn working was pretty easy. I mounted the horn under the front rack. I will post a picture of that location later.
What he did was much more complex and involved. I would note that I was trained in electronics in 1965 in the USCG, was a Field Engineer at NCR in the 70's and retired as a network design engineer at BofA/EDS. This kind of things is more or less in my wheel house.
Now knowing the left and right turn indicators use the light blue and orange wires, and from a cable by the master cylinder with a blank plug in it. Testing show that these wirers went to the front turn indicators and the left/right turn arrows in the instrument cluster. So I have the front turn indicators and the arrows wired to my handle bar switch. I have not cut any factory wires so far
I picked up a mini Add-A-Circuit to pull the turn signals power from the fuse panel.
Relays to do the 4 way flashers will be here tomorrow. I will have to use two(parallel them) as I had ordered SPDT relays.
Cost so far, with not much more to buy.
$7.63 License plate lights
$7.63 Relays for 4 way flashers
$10.90 LED rear lights
$27.26 Horn, handle bar sw, and blinker relay
$8.34 Add-A-Circuit
$5.00 Miscellaneous supplies
$66.76 Total