Switch box 230v angular configuration, left and right

Switch box 230v angular configuration, left and right.
After i created and mounted this switch box, I got the question, why the power adapter need a frame? Then the frame of power adapter was dismantled and I just drilled a single hole Ø 4.2 mm, what has allowed me to mounted the power adapter directly on aluminium profile. See pics.As a result the printer has less vibration and I think this mounting is stabler.