Tranny Leak?

I have a few drops of red fluid (ATF) hanging on the bottom of my car. I am attaching a link to view where I see it coming from. If you could tll me what it is, and how hard it would be to fix it, I would be very greatful.

http://files.automotiveforums.com/gallery/showgallery.php?cat=500&ppuser=221058&password=

Picture updated of actual car. Any help would be greatly appreciated.

http://files.automotiveforums.com/gallery/showgallery.php?cat=500&ppuser=221058&password=

Tightened 3 bolts on cover approximately 1/2 turn each. Leak gone (for now).

The windstar uses a re-usable gasket.
So...tightening up the bolt will most likely be the solution...as in...it should last

Im still wondering what is under this round cap. Should there be ATF fluid in there. Is it some type of bearing?