Toyota prius Owner's Manual page 191

Removing a child restraint system installed with a seat belt
Installation with ISOFIX rigid anchor (ISOFIX child restraint sys-
tem)
Adjust the head restraint to the upmost position.
STEP 1
Widen the gap between the seat cushion and seatback
STEP 2
slightly.
STEP 3
PRIUS_OM_OM47871E_(EE)
1-8. Safety information
Push the buckle release button
and fully retract the seat belt.
Latch the buckles onto the exclu-
sive fixing bars.
If the child restraint system has a
top strap, the top strap should be
latched onto the anchors.
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