I just bought a '98 maxima and the seat belt clips are stuck under the seat, two of them are completly under so far I can't even see them.
Can anybody tell me how the back seats are hinged?
I need to pull it up a bit to get the clips out.

 

Pull the latches from underneath bottom seat cushion and pull the seat out. I'm pretty sure you can get the seat belts through the slits by only doing that step.

 

There are some bolts on the sides where the bench and the back meet. Take those out (one on each side) Open the through hole to the trunk and remove the vynil that is connected to the arm rest. There are one or 2 bolts there. Then just lift up on the back part. Thats pretty much it i think.

 

For Seat belt clips you only need to pull the two tabs and Push up.

Pull one tab push up, Goto the other side Pull tab Push up.

Here's some Visual Help-