its a really tight space and i was upside down for most of it. its totally worth it though.
the 12mm nut is behind the bracket. you won't be able to see it so you need to feel for it with your wrench. just get it loose and you can undo it with your finger. to actually adjust the pedal height, you need to press the clutch in just the right amount and turn the rod with your fingers. it took me some tries to start getting the rod turning, but once you figure it out, its not that bad.
