Ok. Never found a wiring harness for the Ford F53 chassis (2019 THOR ACE 30.3)
Even went so far as to contact Metra technical support (not their distributors).
He asked for pictures, and I must say, their technical support seems top notch, especially as far as he is concerned, I am a one off, and he should be supporting distributors (I assume) not me. They apparently don't have any Molex style connectors of any kind.
I did create a solution.
I purchased the following Molex connectors from Amazon...
Also purchased the crimping tool... (bummer for one connector)https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
I used these to connect directly to the pigtail connector furnished by the radio vendor.
You will NOT need the extraction tool unless you mess up like I did.
I had the right sex on the connector, but put in the wrong sex on the individual terminals. DAMM!
I did get it working.
NOTE!!!!: Most radio vendors wiring harness wires are so thin, that they are difficult to use with these Molex terminals. I recommend doubling or tripling the stripped lead (fold it over) to increase the amount of "meat" you can grab on to.
Hope this works for others.
BTW - I purchased an Android based head unit from ATOTO