Which way should I mount a Kaiser dry lining back box?

When using the Kaiser range of dry lining back boxes the tendency is to mount it with the wall fixing screws top and bottom and the keypad screws left and right.

This is ok for most keypads however it is better to mount the box with the fixing screws left and right and the keypad screws at the top and bottom as this will work for all keypads including the Basalte Sentido and Deseo keypads.