LOGO! 24RCE - How to add custom msg to Start Screen?

I have two LOGO! BMs on a control panel. Each controls equipment in separate rooms. I'd like to configure the LCD Start Screens to indicate which BM is associated with each room - e.g. Room A12, Room B13.

The Setup > Start Screen menu has three options (Clock, Input DI, Menu). The Input DI shows state (HIGH, LOW) of the BM's digital inputs - filled in is HIGH. I am not using I7 & I8, so my thinking is to set them both HIGH as a visual clue that the BM with the filled in I7 & I8 are for room A12. I'd hate doing this, BTW.

NOTE: I will program and setup the BMs, and ship them to a field tech who will do the control panel install. Yes, I could put an adhesive label on them, but I am also thinking ahead to Remote Administration of the units, so sticky labels aren't suitable.

I have also been looking at the the available Siemens Expansion Modules, thinking there might be one for something like this. Not seeing anything suitable - here's where I've been looking:

Please let me know your thoughts.

Thanks,

Bob