Dodge Charger Owner's Manual page 79

THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 77
For center seating position route the tether strap over the
seatback and adjustable headrest (with the headrest in
the full down position) then attach the hook to the tether
anchor located in the panel between the rear seatback
2
and the rear window.
Adjustable Headrest Downward Position
Adjustable Headrest Release Push Button