Lukenick.. Just checking here. When your first hooked up your battery to the trailer and found it was dead, did you put the WHITE wire to the NEGATIVE battery terminal and the BLACK wire to the POSITIVE?
Also when you are testing your 7 way plug make sure your orientation is correct. The picture on the internet could be up and your actual plug on your truck could be sideways.
Otherwise paintinfool seems to be taking care of you.
PS... Your charging numbers are too high. Something is going on there.
I say just hook the battery back up to your TT and proud it into shore power and let the converter charge it.
2016 North Point 341RLTS
520watts of solar. Morningstar MPPT
2017 F-350 Platinum CC SRW