I don't have anything in front of me. You have a picture? From what I recall the main middle is the keep away top to bottom. You have like 1/8th of the surface area on each side to use. I've only put our lake sticker (Upper right/driver) and our pike pass (Upper left/passenger).
It looks like the gray area (zone D) extends from the base of the windshield to the front of the dash.
Between the info in the Eyesight manual and the Quick Guide NOTHING should be placed on the dash. They don't even want you to Armor All because of reflections!
The full manual illustration shows reflections from the "monitor" back towards the Eyesight cameras, so I wonder if a rubberized cover would stop the reflections (my screen is always perpendicular to the dash, so no reflections from it).