the metal cables activate the locking clips, that is what holds the seat in place and releases it to move it, they are hook shaped & spring loaded and clip onto a round metal piece, you may call them something else, I don't have my nbs anymore so I don't have something to look at hands on at the moment my ex has a 2004 and will be by here later today I will look at hers but I don't remember there being any seat adjuster on mine but it could very well be that if nothing is jammed up or bent and not allowing it to move all the way back, I am pretty mechanically inclined for this type of thing but it has to be right in front of me so I can see what it is actually doing.