I'm guessing you found it, but is your adapter one that drops down? If so that increases leverage and stresses the structure more. Something like the anderson doesn't drop down the adapter but manufacturers still try to make an issue of it.
2007 Rockwood 2701SS
2017 Ram 2500 Granite Crystal SAP Laramie 6.7L
2014 Triumph Bonneville. NH Togas, tuned
1953 GMC 9314
1982 GoldWing Interstate