Rear Kombi Panels Lower Corners

[SlothBurger]

Why would my rear panels in a 2019 Kombi have the lower corners of the panels missing as in the photos?

I can make some to replace but just curious why they aren't full panels covering the whole section on each side. They've been like this since I got the van. I covered the other part of the panel but going to replace with full panels. Is there a part number for the missing pieces?

 

[64 SPLIT]

The slam vents are in those corners (behind the rear corners of the bumper) so I expect it's to allow sufficient airflow. Mine are the same.

 

[SlothBurger]

The slam vents are in those corners (behind the rear corners of the bumper) so I expect it's to allow sufficient airflow. Mine are the same.

That makes sense. My doors still don't shut though since I added the extra rubbers. And these holes allow road noise in even though I've soundproof in behind the panels.
So I think I'll be maybe drilling some holes in a larger panel further up from the slam vents.

 

[JumpShip]

I've made full length panels for ours with holes in to help things ....still quite awkward to shut the doors unless you've got a window cracked .