50 amp plug off-set

[Cook-Den]

Hey everyone, just picked up our new 305rl, I installed a 50 amp service at the house and it plugs in fine to the box but when i plug female end into the 5th wheel the plug is off-set 90 degrees putting a great strain onto the plug due to the weight of the cable. Can i take the receptacle apart at the back of the 5th wheel and rotate it down 90 degrees so the cable hangs straight down? Has anyone else encountered this?

Thanks in advance for your help
Den