Yes, I noticed this, but was not sure if it was a soft buffer to land the ends of the PRHT window on, or velcro loop or what. It seems inadequate to hold down some foam filter. See the pictures.
Driver’s side, you can see where the two upper body drains (round rubber tube, flat plastic tube) discharge their outlets by the piles of dust under them
Driver’s side today after yesterday’s vacuuming, without the dust piles. Drain below the grille is dead centre and visible in this pic
Passenger side