For that bolt, I use a very cheap and very narrow wrench.  If you get a real
skinny one, or make it skinny with a grinder, you can slide it into the small
opening in the bracket (facing the engine).  Getting the bolt started when
reinstalling is a whole other matter.  I've tried taping the nut to the
wrench to hold it in place while starting it.

Bill Marshall
85 GL Tiico "Pandora's Box"
Bradenton FL