Originally Posted by
C2H5OH
My question was related to how they get into these postions.
I have not seen any detail of the lower hinge locking bolts. It appears to me that the guide fitting is locked by a headless socket cap screw and a jam nut. (Just speculation though as the photo resolution is not good enough to be sure)
Edit - later information shows this is a through bolt with castellated nut and cotter pin.