The link to the BedWedgies page it says these are for Coleman and Fleetwood pop-ups. You might want to check with the vendor to ensure they will work on a Jayco.
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TV: 2009 GMC Sierra 2500HD | Crew Cab | Std. Box | 4WD | Duramax/Allison
RV: 2000 Jayco Eagle 266 | FBS | TT
PREVIOUS: 1986 Coleman Laramie pop-up -- Still in the family!!!
I know this is old, but I have felt like a part was missing there, too. Rails are exposed and sharp; the plastic caster liners also tend to come out while setting up.