As far as I can remember this breathing accessory to the classic storm trooper armor was not in the movies. Its pretty cool though and would make a fun alternative Storm Trooper for cons or general trooping.
I dig it. It'd make sense to use the front areators as connection points. Perhaps this is eluding to the TFA's armor designs in that we're seeing similar aspects. Though to troop with, that hose needs to be really flexible and long enough to move your head around. That can get annoying to have your helmet pulled to one side....
Oh...an it's an ROTJ stormy..Nice shin guards on your shin guards