Chevrolet 2010 Corvette Owner's Manual page 69

A top tether (A, C) anchors the top of the child restraint
to the vehicle. A top tether anchor is built into the
vehicle. The top tether attachment (B) on the child
restraint connects to the top tether anchor in the vehicle
in order to reduce the forward movement and rotation
of the child restraint during driving or in a crash.
Your child restraint may have a single tether (A) or a
dual tether (C). Either will have a single attachment (B)
to secure the top tether to the anchor.
Some top tether-equipped child restraints are designed
for use with or without the top tether being attached.
Others require the top tether always to be attached.
In Canada, the law requires that forward-facing
child restraints have a top tether, and that the tether be
attached. Be sure to read and follow the instructions
for your child restraint.
If the child restraint does not have a top tether, one can
be obtained, in kit form, for many child restraints. Ask
the child restraint manufacturer whether or not a kit
is available.
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