2008 Nissan Armada Owner's Manual - Page 61

If the seating position does not have an adjustable head restraint and it is interfering with the proper child restraint fit, try another seating position or a different child restraint. WRS0800 LRS0671 Forward-facing rigid-mounted - step 2 3. The back of the child restraint should be secured against the vehicle seatback. If necessary, adjust or remove the head restraint to obtain the correct child restraint fit. If the head restraint is removed, store it in a secure place. Be sure to reinstall the head restraint when the child restraint is removed. See "Head restraints" in this section for head restraint adjustment information. Forward-facing - step 4 4. For child restraints that are equipped with webbing-mounted attachments, remove any additional slack from the anchor attachments. Press downward and rearward firmly in the center of the child restraint with your knee to compress the vehicle seat cushion and seatback while tightening the webbing of the anchor attachments. 5. Tighten the tether strap according to the manufacturer's instructions to remove any slack. 1-44 Safety-Seats, seat belts and supplemental restraint system