Enable/Disable EVCS' display via Modbus?

Installed my EVCS a few days ago, so far things are working well. However access control is something I’d like to control via modbus. I know I can do via GUI, but I want to disable the display automatically when nobody (no cell phone) is at home (logged in).
All I need a modbus register to control the display.
As far as I can see the modbus list 3.50 doesn’t show a register for this purpose, or am I missing it? Maybe there is a newer version?

found a dedicated V 3.50 List with all the EVCS specific registers

Looks like Register 505 does the trick