On my Cedar Creek Hathaway model there is a 1x2 piece of wood the length of the fridge, that is screwed to the floor ahead of the fridge wheels. I also installed a strap that secures the fridge to cubbyhole wall sides. I found one on line that has two eyelets one on each end and a quick connect release connection in the center. This is similar to the chair straps that hold our dining room chairs in place in our trailer.
I would attach a picture but we are traveling right now and I do not havre access to my picture files.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 135K+miles