Cadillac CTS 2008 Owner's Manual page 52

2. If the child restraint manufacturer recommends that
the top tether be attached, attach and tighten the
top tether to the top tether anchor, if equipped.
Refer to the child restraint instructions and
the following steps:
2.1. Find the top tether anchor.
2.2. Press the ribbed area of the cover to open
the cover and expose the anchor.
2.3. If you have an adjustable head restraint,
raise the head restraint.
2.4. Route, attach and tighten the top tether
according to your child restraint instructions
and the following instructions:
1-48
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 a fixed head
restraint and you are using
a dual tether, route the
tether around the head
restraint.