That appears to be the same as mine on my 195RB with side (window type) air conditioner. It is the intake for the AC that then blows out the side fins. Under the plastic top you will find a hole down into the top of the AC cabinet in the RV. Mine had about a 1/2 inch mesh that might stop squirrels, but maybe not mice or bugs. I added a layer of aluminum screen wire to keep bugs out.
I put a square of Etearnabond over each screw head to keep water out and minimize rust.
Inside I pulled the trip wood from around the AC and cleaned up dead bugs and added some noise deaden-er self stick sheets to the sides to reduce noise.
Simply put, the air comes down through the vent into the box around the AC. Intakes on the sides which would normally stick out the window suck in the air and run it through the AC coils and blow it out the fins.
Your fridge is a short one and the intake and exits are the two black vents on the side right behind the fridge. On bigger campers with tall fridges the heat goes out the ceiling through the same type vent, hence the confusion on it's purpose.
If you have any fridge problems with not cooling pull both black vent covers off and inspect for problems, another big topic as very poorly made.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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