So I found the power line. The auxiliary AC unit was pre-wired as described, and the power line is terminated in a single gauge metal enclosure under the bad. There are two yellow romex cables (12 Gauge) running into it. One goes to the AC unit, and the other goes to the generator.
To accommodate the AC unit, I had two choices that don't put my electrical system at risk.
1) installed a 20amp service plug into the side of the RV,
2) run cable from new service ports to a new 20 amp auto-switch.
3) Install 30 amp breaker panel in place of prior the single gang box.
4) Rewire 12 gauge wires from the old gang box to new auto-swtich, and and breaker panel
My other choice was to upgrade the wiring to 50 amp
1) replace auto switch with 50 amp
2) add 30 amp breaker panel
3) rerun 30 amp power line as 50 amp power line
4) replace 30 amp service plug with 50 amp service plug
5) rewire system to split 50 amp to two breaker boxes (old 30 amp, and new 30 amp)
I chose the expensive solution for upgrading my unit to a 50 amp service.
I will not be able to run 2nd AC unit on Generator power, but that is fine.
Thanks everyone for all your feedback, it all helped me get off my butt and figure out the wiring, and to realize I need to just spend the money and perform the upgrade to 50amp service.
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