Just a suggestion: Get used to finding screws where you least expect them in numbers you don't expect. Develop a keen eye for hidden fasteners. I don't think that there is a set way that the fridges were put in so you are kind of on your own in finding the hold down screws. As Janie Q says, there are screws in back as well as screws in the front. Look around in the area in back of the fridge because screws there really help stabilize the unit.
The fasteners that irritated me the most were the rivets placed where they couldn't be drilled out.
1978 Argosy 6 Metre Minuet
2006 Toyota Tacoma