All,
I finally got around to cleaning off all the factory bolt paint on my new T100 when I came across this "hole." It has a shine mark around it where some bolt/washer scraped it clean, but it isn't threaded and only an inch deep.
I know this is probably obvious to most/all of you, but I was wondering what it is...
Thanks and happy Memorial Day to my fellow Veterans.
Semper Fi,
Hitch