Unfortunately, the bozos at Photobucket deleted hundreds of my photos from their Hosting site so all of my old photos are gone. Here are 2 photos that should show you the technique I used to "clamp" the cages between the EarthBox and its metal stand:
I bent the tip 1/2 inch of each leg inwards toward the EarthBox to tuck-in between the 'Box and the stand. You could fashion something similar for an EarthBox sitting on the ground (think of using concrete blocks around the outer edges to sit the EB on).
Raybo