Up until this point, we had just used heavy ratchet straps to hold fridge in place going down the road, and once we arrived at our destination, we would use it like any fridge in a house. The short 2x4s on the back of the fridge are for spacing, as ratchet strapping the fridge in wouldn't work with the curve.
It was time to anchor that fridge for real, and put in a pantry while we were at it. I lagged some 2x2s to the floor to make a good anchor point for the walls of the pantry, similar to what I did with the bunks.
Using 2x4s and 2x2s for the wall studs, we framed the pantry. Unlike the bunks, where we made the walls thicker using the "4" of the 2x4 to allow for insulation, we built the pantry walls using the 2x4s flat. The fride was then lagged to the 2x4s. Since the fridge is the type with the coils on the back, I didn't have to worry about piercing the skin a bit. We also laid out the wall to allow for a grab handle to make it easier to climb the steps.
I then skinned the pantry outside and in, using individual panels (which took forever) so that I could service electrical or, God forbid, take the fridge out if it fails. Notice the step light, which was originally intended to be a license plate light for a car.
The fridge is anchored in several places and is a solid as a rock.