With the tops level I could then bolt a 1" wide 1/4 inch steel flat bar using 3/8" bolts to hold them together with a strap holding them down between the seat latch plates on each side of the inside of the Jeep.
Picture of how Chloe and Bailey fit before. Chloe is comfortable but for Bailey it was a bit tight.
Previous post done June 2013:
Where I got my second crate:
Good retailer who owns and understands Vizslas.