Humbaur Trailer; power plug mount

The original power plug mount is annoying and you can`t move the Trailer without loosing the power plug.
My power plug mount is made for the hole in the axle.
Insteat of my nut you can also use a common m10 nut.

update 11.27.2020: humbaur_1_3_part1/2.stl

I add a improved version of the power plug mount!
There are two parts and prevent the mount to rotate.
(my trailer is a 750kg version)