Most important finding-Learned that the dash switch controls the ground circuit. I haven't done this kind of wiring since the 80's. Things have changed! All higher current +wires stays under the hood and is handled via relays. Dash switch only contols ~0.3 amps. This will not change irregardless what other lights I add. It only closes the ground that activates the relay under the hood.
If you want to use the new relay and wiring, you could use the existing fog light line to be the trigger for the relay - thus retaining the OEM switch.
That was my original thinking based on my (outdated) experiences from 20-30 years ago.
Found some schematics and ground wire ID. Went into the PDC box and tapped the ground wire from the 85 relay terminal.
Connected the _on/off switch to relay wire_ to the battery for power to operate the relay EM.
I used everything that came with the light kit except the on/off switch, including the relay as noted in original post.
I now have aftermarket lights that operate from the dash switch exactly the same as the original lights did.
After I eventually found some schematics, your wiring information was right on the money.
PS- At the risk of sounding a little negative, I bought fog lights to replace fog lights to use when I am driving in the dark in rain/fog. I know the difference between fog lights and driving lights. And I have 25 years background in law enforcement. I know what the law says about the operation of fog lights, driving lights, etc. and I had no problem whatsoever about writing tickets to @#$holes who blinded me when I was on duty.