To attach such a sheet, you should remove the cover panel so that it ends up behind it, which is a job in itself. Then you will probably need to replace at least a couple of these cover boards.
You should also check how your foundation is ventilated, so you don't block any existing ventilation that should be there; if so, you might need to install vents in 'good' locations.
This would probably be best done if you're already planning a larger facade renovation, I would think.
Sockelbeslag seems to be the name of the sheet:
