Welcome to the forum its a great place to get your questions answered. If your rig is less then a year old from original purchase take to the dealer otherwise you can access that area by removing the trailer undercover or cutting a three sided hole in the cover to allow access to the area and when repaired tape the cover back in place.
Jake my sidekick (yellow Lab)
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho