Front opening. It came with the camper. There are better, less power burning units. Lots of threads here discussing and cussing fridges and power.
Don't beleive any average power draw ratings. That number is always based on unstated assumptions of ambient temperature, temperature delta between ambient and your fridge internal temp setting, how many times you open the fridge, etc.
What matters is what is the running amps, the number of hours per day the compressor is running to maintain internal temp., efficiency of compressor, any cooling fans to dump heat out of fridge compartment and any additional insulation you place around the fridge.
Getting that data depends on learning how you use the fridge. Running the fridge in Death Valley in the warmer months means a lot more runnning hours per day than running the fridge in more northern areas or in the cooler months.
This leaves only the rated running power consumption as a way to compare two fridges.
Best thing you can do is to make sure you install a battery monitor that displays the running amps, total amp hours consumed and replaced and battery state of charge and voltage. This will tell you if you need to find shore power to ensure that you have sufficient energy to keep your food safe.
If weather is not allowing solar to keep up, over some time frame, you may need to find a campground with electrical hookup for a night to fully recharge your battery.
Paul
Paul.