You hook the cover on top and push it in place top to bottom, to attach/seat the bottom clips. Similar clips can be purchased at an auto store if they are broken.
Here is an old thread that may help....
http://www.ridgelineownersclub.com/...roken-clip-inner-portion-front-seat-back.html
Here is an old thread that may help....
http://www.ridgelineownersclub.com/...roken-clip-inner-portion-front-seat-back.html