Installing a RV Refrigerator?

I see that all RV refrigerators us LP and electric.
There is usually a vent on the sides of all RV's for the fridge. And sometimes I see one with a vent on top too. If I were to buy/install a RV fridge on a cargo trailer conversion, what all would I have to do?
Thanks.
There is usually a vent on the sides of all RV's for the fridge. And sometimes I see one with a vent on top too. If I were to buy/install a RV fridge on a cargo trailer conversion, what all would I have to do?
Thanks.