I need to replace the battery in my 99 Z3. I'm such a dork, I can't figure out how to remove the battery mounting bolt... I don't see anything in the tool pack that I can attach the lug nut wrench end piece (sorry, I don't know exactly what it's called) to that would enable me to get way down into that cavern... I figured they must have included the necessary tools to remove the battery, right?

If anyone has any insight, I'd really appreciate it.