Hi all,
part of building a layout is electrical work.
Lots of wiring, but what also needs to be considered are the controls and placement of the transformers.
Here we mounted a board vertically under the layout with the power supply for the CS 3
as well as two transformers for the layout lights.
There is space for more if needed later.

Second photo is the where the trains get controlled.
CS 3 for the main layout, the white Märklin transformer is for the analogue separate outer AC line.
The blue DC power pack is for the separate outer DC line.