I'm working on a Schwinn Searcher hybrid (nothing fancy ). It has Shimano Nexave tap fire shifters and derailleurs. I am trying to adjust the front derailleur. The bolt for the cable is placed right behind the derailleur cage, making it almost impossible to reach, unless I pull the cage all the way out, in which case the cable will have too much tension.

I have worked on countless derailleurs, I have never seen one before with a cable bolt placed right behind the cage that cannot be accessed easily with an allan key. See attached picture.

Is there a trick? Do I need a special tool?