Not sure how the 4R rear seats work, but I have 40/60 split seats in the FJC. I removed the driver side (40) lower seat portion and flip the back down. It sits flat and I cargo strap the fridge handles to the seat brackets. Actually using the ARB straps on the front, and a standard ratchet strap on the rear handle.Those of you with 4runners, how do you have your fridge secured in the back? @wngrog