The kids somehow managed to cause the sliding lever to become disengaged on the 2nd row passenger side seat. I can fold it down and up but cannot use the front lever to slide the seat back so someone can sit there. I checked the torx screw on the lever and it is fully tight. The mech is disengaged. How do I access it to take a look to trouble shoot? I don't want to start ripping panels out without knowing what I am doing. Any tips or videos?