Dodge Durango Owner's Manual page 238

236 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
Slide the crossbar outward, away from the center of the
roof. The crossbar will nest fully within the side rail.
Crossbar to Side Rail
Once the driver's side crossbar is in place, tighten the
thumb screws completely.
Tightening Crossbar
Repeat the procedure to stow the second crossbar on the
opposite side.