Ford 2010 F-250 Owner's Manual page 146

Driver Controls
2. Open the latches to release the
panels.
3. Rotate the panels toward the
tailgate.
Repeat Steps 1–3 for the other side of the bed extender.
4. Connect the two panels, then rotate both knobs a quarter-turn
clockwise to secure the panels.
146
2010 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)