Pontiac 2005 Aztek Owner's Manual page 121

3. Make sure the pin on bottom of the convenience
tray fits into the hole on the floor track assembly.
4. Roll the tray forward into the vehicle until
you hear a click.
5. Press the release lever and pull the tray onto
the tailgate.
6. Connect the hook to the tethered ring located on
each side of the sliding rear convenience tray.
7. Push the release lever and roll the tray back
into the vehicle.
You will hear a click when the tray is locked
into position.
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