RAM 1500 Owner's Manual page 112

110 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE
Tether Strap Loop With Head Restraint In Raised
2. Place a child restraint on the seat and adjust the tether
strap so that it will reach over the seat back, under the
head restraint, through the tether strap loop behind
the seat and over to the tether strap loop behind either
the right or left outboard seat.
Position
3. Pass the tether strap hook under the head restraint
behind the child seat, though the tether strap loop
behind the seat and over to the right or left outboard
tether strap loop.
Tether Strap Through Center Tether Strap Loop