I have been trying to solve that puzzle as well. It seems to be made to fit the tailgate locking mechanism on each side of the tailgate (the 'spool' that's attached to the strap).
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Red Alert 2006 Titan Crew Cab LE 4x2 Big Tow
Push the strap end attachment into the locking mechanism of each side of the tailgate until it snaps into place. To release, reach under and activate the tailgate latch.
These straps keep the extender from moving/bouncing up and down.
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2004 Titan Smoke LE CC
Born 11/18/03
Bed Extender, Overhead Racks
Hood Protector, Banks Monster Exhaust, Volant CAI, Hellwig Rear Sway Bar, Bilstein shocks
Never argue with idiots. They'll drag you down to their level and beat you with experience.
-Gambit
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