My rv was a 89 Southwind at the time I used that Avanti, it's coils were in the sides, not exposed. It was use by us over 2 years and 20,000 miles in a P30 chassis. it was smaller than the gas rv fridge by about 3" at the top and a inch on each side. There was no place to bolt it down on it's base so I used a can of foam, some on the base and a few spots on the sides. If I were doing it again, I would put temporary board strips on the sides to limit how far the foam could expand to. Instructions be damed, mine worked fine in the Texas heat, even at Big Bend. I bought oak strips and stained them to match the RV to fill in the sides inside.
We bought several sets of the Camco rods to hold everything in place inside and used rubber tips on the ends of the rods from the hardware store, the plastic rod ends against the refrigerators plastic sides didn't hold well over rough roads. We used heavy duty wide velcro with adhesive back to keep the doors closed.
We also used a auto switchover inverter with a charging ckt built in and battery power on the road. Made ice, kept the food cold. It's a modified sine wave inverter too. I included a picture of the same inverter now in in my 2000 rv.
https://imgur.com/a/ImXKBub
