2:)
then the underside is put into the recesses of the rear side.
Make sure that the drill holes match the holes of the spacers. Then the base plate
can be screwed down with 4x M3x6mm screws.
3:)
Now the mains switch is clipped in and the cables are plugged into the 2-pin plug of
the filter board. The cables have to be soldered to the switch.
