What is this?

["R. Ashford Little II" <ralittle2@mindspring.com>]

I took my carpets completely out of my TR6 recently to let them dry and
discovered an unusual hole in an inner sill.  The pictures are on my
website under the link entitled "what is this."  The photos are taken
looking down into the passenger footwall.  The hole in question is near
the front of the inner sill.  The pics can be viewed at the link below.
 
Thanks,
 
R. Ashford Little II
www.geocities.com/ralittle2