If you do want to move the box to different spots around the layout perhaps a few connection points scattered around might be the way to go.
Something like this, of course you may have to investigate if you can leave the outlets unterminated or maybe make a terminator plug for the unused ones.
Just plug in the controller wherever you want to control from eg one in a shed for hot days and out in the garden for sunny days.
I had something similar to this on my small HO layout using a NCE Powercab
Just food for thought
