Cadillac SRX 2004 Owner's Manual page 51

If your child restraint does not have the LATCH system,
you will be using the lap-shoulder belt to secure the
child restraint in this position. Be sure to follow the
instructions that came with the child restraint. Secure
the child in the child restraint when and as the
instructions say.
CAUTION:
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In a crash, a child secured in a rear-facing
child restraint in the center rear seating
position could be injured by the vehicle's
armrest. To reduce this risk, the armrest
should first be secured with a special armrest
retention strap. You can get this from your
dealer.
Center Seat Armrest Retention Strap
Install the armrest retention strap following the
instructions that come with it.
1. Put the restraint on the seat.
2. Pick up the latch plate, and run the lap and shoulder
portions of the vehicle's safety belt through or
around the restraint. The child restraint instructions
will show you how.
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