Okay, I'm having a dumb moment that happens to have lasted for a few days. As I'm reassembling the interior of the 300D, I have found a hole in the carpet matching up to a hole with a threaded clip, but I don't remember anything bolting to it.
Help?
The green circle is where the seatbelt attaches. What the heck goes in the red circle? It's present on both sides of the car.
