Buick 2005 LeSabre Owner's Manual page 46

Lower Anchorages and Top Tethers
for Children (LATCH System)
Your vehicle has the LATCH system. You will find
anchors for all three rear seating positions.
This system, designed to make installation of child
restraints easier, does not use the vehicle's safety belts.
Instead, it uses vehicle anchors and child restraint
attachments to secure the restraints. Some restraints
also use another vehicle anchor to secure a top
tether strap.
1-40
A. Lower Anchorage
B. Lower Anchorage
C. Top Tether