I need to replace the drivers seat motor on my split bench seat. Can't get to back bolts- seat too far back. How can I manually move seat up to make rear bolt accessable?

An allen wrench stuck in the end of the motor on my 1980s Caprice did the job with numerous turns on the motor/wrench.

I am older and fatter and can't see the end of the motor to check it out. It it the same set up and what type and size of tool?

Thanks for any help.