Chevrolet 2013 TRAX Owner's Manual page 94

3-50 Seats and Restraints
2.3. Route, attach, and tighten
the top tether according to
your child restraint
instructions and the
following instructions:
If the position you are using
does not have a head
restraint and you are using
a single tether, route the
tether over the seatback.
If the position you are using
does not have a head
restraint and you are using
a dual tether, route the
tether over the seatback.
If the position you are using
has an adjustable head
restraint and you are using
a single tether, raise the
head restraint and route the
tether under the head
restraint and in between the
head restraint posts.