Pontiac 2001 Aztek Owner's Manual page 60

4. Buckle, position and release the safety belt as
described in "Rear Seat Outside Passenger Positions"
earlier in this section. Make sure that the shoulder
belt crosses the shoulder.
To remove and store the comfort guides, squeeze the belt
edges together so that you can take them out from the
guides. Pull the guide upward to expose its storage clip,
and then slide the guide onto the clip. Turn the guide and
clip inward and in between the seatback and the interior
body, leaving only the loop of elastic cord exposed.
1-48
Second Row Center Position
For second row center position do the following:
1. Remove the elastic cord from under the head
restraint of the center position.