I would label the panel in this order from Left to Right in each room.

To Put back the assembly after a flood, Install Vertical, then panel, then vertical, panel, Finally Base 1,2,3,4.....

(1) Room Id, (2)Vertical Trim label as A,B,C... (3) Panel ID..1,2,3,4... Wall Base ID..1,2,3,4,,.

"Bedrm, A-1-B-2-C-3...."
Wall base label Room ID..Bed-mtr, 1,2,3,....