Here's the first power up!
No smoke, but it's in the Amp position and reading Volts.
Hmm, I wonder if I should take apart and make a new harness, or change the label?
I am running a 4.1 amp LED as a load, the voltage of the Harbor Freight under 44 Volt Amp Meter is 1.36% lower than the Whatt Meter. I can live with that.