Wow, I don't think mine is right there. Hmm
It really isn't that daunting but if you don't feel comfortable doing anything with that then don't and have an electrician or someone more knowledgeable work on it.
The wires aren't labelled but you'll have two inputs (external power, and generator power) and one output going to the converter/breaker panel.
Make sure the coach is unplugged and the generator is off (e.g. no 120V power on any wires) then I'd grab the wires and give them a tug at the wire nuts--see if any pop out of the wire nut (the good news is that looking at your pictures nothing has shorted or melted).
Hey look there is a troubleshooting guide in the manual:
https://www.progressivedyn.com/wp-co...8A-English.pdf
(although that troubleshooting guide has you poke around in there with the generator running--if you're not comfortable doing so then I'd find someone that is).