Rear interior panel hole?

[1970A-66Challenger]

Finally putting the interior back in after many years...What's the purpose of large hole at the bottom of the rear interior panel?   Seat belt fed through it?

[headejm]

Access to install screw on L bracket screwed to floor.

[larry4406]

Access to install screw on L bracket screwed to floor.

Picture of "L" bracket and what does the bracket do?

[anlauto]

No, the seat belt does not go through that hole.

[R/T's 4 R/P]

The large hole is access to the lower window adjustment I think.
The small mounting bracket on the floor is just a screw hole

[headejm]

R/T's 4 R/P is correct. I should have looked at my pictures first. The L bracket is to the left of the large hole in the photo.

[1970A-66Challenger]

Seems odd that there would be a hole in the panel to allow for access to the lower bolt since the panel really has to be removed to fully adjust the window?