Dodge 2012 Challenger Owner's Manual page 49

2. The seat belt latch plate is contacting the seat when the
belt is routed through the seat web guide. When the belt
is routed outside of the seat web guide, the latch plate
will contact the quarter trim panel. Grasp the latch plate
and pull out the belt. Slide the latch plate up the webbing
as far as necessary to make the belt go around your lap.
Latch Plate
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 47
3. When the belt is long enough to fit, insert the latch
plate into the buckle until you hear a "click."
Latch Plate To Buckle
2