Chevrolet 2008 Optra Owner's Manual page 44

Hatchback
For hatchback models, the top tether anchors (B) are
located under covers in the rear cargo area, attached
to the back wall (A) of the vehicle. Squeeze and pull
the front part of the cover to access the anchors.
Remove the cargo shade before installing the top tether.
The cargo shade should remain off while the top tether
anchor is in use. Be sure to use an anchor located
on the same side of the vehicle as the seating position
where the child restraint will be placed.
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Wagon Outside Positions
For outside seating positions in a wagon model, the top
tether anchors (A) are exposed anchors, located behind
the rear seat, on the floor of the rear cargo area (B).
Be sure to use an anchor located on the same side of
the vehicle as the seating position where the child
restraint will be placed.