Ok to understand...your propane tank is mounted at the rear of the RV? And you need to move the tank to allow attaching a tow bracket of some kind?
Or, you have a trailer that has propane tanks on the tongue and the weight equalization chain attachments will be in the way?
Anyway...what holes - the ones holding propane tank straps?
Filling holes with JB Weld is certainly not the best means. If you have to fill them, a welded patch / plug is best. But why do you need to fill them at all? Unless the holes are in structural steel and the weld heat will untemper it...
How about a picture to fill in the gaps? The answer is dictated in understanding the problem for sure.
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2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
ASE Master Certified (a long.....time ago...)
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