Chevrolet 2005 SSR Pickup Owner's Manual page 106

To install the side-saddle storage bins, do the following:
Removable Endcaps Shown
1. Locate and remove the endcap on the side rail near
the forward end of the cargo area.
If your vehicle has an access slot on the forward
end of the side rails, the endcaps do not need to
be removed for installation.
2-48
Side Rail with End Cap Removed Shown
2. Insert a locking tab into the forward end of the side
rail and slide the tab rearward. Then reinstall the
endcap on the forward end of the side rail.
If your vehicle has an acces slot on the forward end
of the side rail, insert the locking tab through the
acces slot and slide the tab rearward.
3. If your vehicle has the floor track covers installed,
they must first be removed before continuing the
installation of the side-saddle storage bins.
See Floor Tracks on page 2-40 for instructions.