Nissan Sentra

I am trying to remove a starter from a 1997 Nissan Sentra GXE 1.6L 4 Cyl. I am able to reach the bolt, but the other doesn't feel like a bolt.I can't even get a wrench on it! Is there a chance that it's just a pin, sort of a guide and that there's only one bolt? Thank you for your help.
Big Steven
April 7, 2007.

Check out the related content below while we wait for the question to be answered by a professional mechanic.