RAM 1500 Owner's Manual page 278

276 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
9. Push clamp wires up and under the flange of box (or
flange of Ram Box rail, if equipped) to the semi
clamped position.
Semi Clamped Position
10. Push clamp handles upward to the clamped position
to properly engage the clamps.
Clamped Position
NOTE: Once clamped, be sure the clamps are not par-
tially clamped to the truck bed flange.