wire harness electrical

Hello, I recently bought a new 2021 Aspen Trail 2340 and am curious where the best location to drill through the roof to run wires to my solar controller/batteries. Please let me know y’all’s set ups. Pictures encouraged..I’m looking at installing a Renogy 200watt solar kit.. or something...

Hello, I just found my fifth wheel trailer wire harness ripped itself out of the junction box located behind the tongue located under the sleeper of the trailer. It looks straight forward to reconnect most of the wires but I want to be safe about it. Can anyone tell me the functions of the...