Yes, definately look in Solera mods for the pictures. I used a different cover that snaps in, rather than the one requiring screw removal.
Note: These measurements assume Solera 24S model with large outside storage door (passenger rear) that utilizes the space under the rear bed for storage.
Your cut will be to the rightside panel as you are looking into the storage bay from the outside. Total right panel measurement is 26" wide x 29" high. Measuring (starting) from the upper left hand corner of that panel, make a mark 9 1/4" right and 3 1/4" down. Then draw a 14" x 14" square on the surface of the panel. Making sure it is "square" to the top edge of the whole panel. Remove that piece. What worked for me here was a cheap dremel type tool, with a round wood saw blade. I'm sure a jig saw would work as well. The material being cut is coated luan 1/4" plywood. After removal, cut three small 3/4" thick wood blocks 1" x 2". These will be glued on the back side of the remaining plywood panel, flush to the cut opening, at these measurements:
Measuring (starting) in the upper left hand corner glue one block 7 5/8" down from top, flush to opening. Then, on opposite side , measure from top right corner, and glue first block 3 1/4" from top and second, 12" from top. (both flush with opening) Wood glue with clothespins or some sort of clamp works good. I suggest you position the cover in the opening and see where best to glue blocks.
Now the cover; can be purchased at Home Depot. White plastic access panel. Measures 16"x 16". I used the spring loaded type and works just fine. (Thus the use of the glued blocks to seat the cover in the opening properly and secure.) The panel is used to gain access through a cut opening in drywall, as a decorative cover. I looked for a link but couldn't find one. Should cost about $15 bucks or so.