OMG, yes, that is backwards and that would explain the smoke when you grounded it out.
RVs use house-wiring standards rather than car - cars, black is ground, RV's and houses - black is hot. But wait, there's more... There are exceptions - a lot of times wires for solar come down as black and red, likewise, sometimes people (like me) add stereo equipment to their TCs and those wires might also be car-type black/red. General rule - black/red together - black is ground, black/white paired together, white is ground. **disclaimer - Take your TC to an rv tech before taking this as the gospel**.
I would be very surprised if nothing is actually fried.
Things to check to see if they're fried - fridge, electric jack controller, stereo, any 12v tv/dvd player if you have one.
'15 F450, 30k Superhitch, 48" Supertruss, 19.5's, Torklift Fast Guns
'12 Eagle Cap 1160, 800watts solar, Tristar MPPT, Magnum Hybrid 3k Inverter
'15 Wells Cargo 24' Race Trailer, 600 watts Solar, TriStar MPPT, Xantrex 2kw inverter
'17 Can Am X3 XDS Turbo