Here is a view from up high with some points labels for reference in the
closer in pictures.
http://home.comcast.net/~reeyees/hole3.jpg

Here is a view where you can start to see the hole and the points of
reference labeled
http://home.comcast.net/~reeyees/hole1.jpg

And here is as good a shot as i can get of the hole
http://home.comcast.net/~reeyees/hole2.jpg

Either some bolt used to go through here, or some tube used to go through
here, or somehow someone busted a big hole in thick metal.

I appretiate any input,
--Cameron