The shortcoming of the colleagues I kan not reinforce that you have to unscrew the board out to fix the housing.
I am used as an electrician that such housing be mounted by plug-shifting screw to the wall.
What does that mean for lending?
It's behind a slot - to find slot, ie drill holes on the wall and turn the screws until approx 1-2 mm in.
After that put the holes on the screw heads and pull in the direction of the long holes or push and you keep the whole on the wall.
In addition, this is connect with a Rangschier knife no problem at all.
I'll buy the patch panel back wen I need a.