RAM CHASSIS CAB 2015 Owner's Manual page 102

100 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE
Tether Strap Loop With Center 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 the
center 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 center tether strap
loop.
Tether Strap Through Outboard Tether Strap Loop