What are these holes for?

[8man]

I was planning my attack on the 54 cab today and noticed the following holes.

IMG_2070 - Copy by Robert Moorman, on Flickr
The hole in the track of the weather-strip channel is a mystery. Also, what did they cover the pillar with, there is a large hole where the sheets of metal don't meet just to the right of the hole in the channel.

IMG_2069 - Copy by Robert Moorman, on Flickr
IMG_2068 - Copy by Robert Moorman, on Flickr
These holes are just under the back window, 2 on each end and 2 in the middle. What are they for?

IMG_2067 - Copy by [url=https://www.flickr.com/photos/156472925@N05/]Robert Moorman[IMG_2066 - Copy by Robert Moorman, on Flickr/url], on Flickr

There are 3 holes over the front window, one each, just inside the sun visor mounts and then one in the middle. What are these for?

Thanks.