Chevrolet Optra 2004 Owner's Manual page 50

These labels are located at each lower anchor position,
near the base of the seat.
Child restraints and booster cushions that can be used
with the LATCH system are identified with label A.
1-44
CAUTION:
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If a LATCH-type child restraint is not attached
to its anchorage points, the restraint will not
be able to protect the child correctly. In a
crash, the child could be seriously injured or
killed. Make sure that a LATCH-type child
restraint is properly installed using the
anchorage points, or use the vehicle's safety
belts to secure the restraint, following the
instructions that came with that restraint, and
also the instructions in this manual.