The mobile home industry in the 60s used aluminum power wires and there were many fires when the wiring failed. A tightly squeezed fitting will just cause the aluminum to cold flow away from the connection over time. It is not a question of "if" but "when".
We need to remember that everything inside the trailer is experiencing basically an earthquake as the unit rolls down the road. The frequency of the shake , rattle and roll varies with the tires type and their pressure, suspension condition, speed and road conditions, type of hitch and tow vehicle....
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels