Adding a fridge Fan - Push or pull

[hxckidd]

So I did a couple of trips in 105-degree heat where my fridge wouldn't keep up... well no kidding my AC doesn't keep up either in that heat. I knew that going in. But I like to tinker so I thought I would add a fan for the fridge. Now the question becomes.

1. Mount a fan on the side vent below the fridge and push air in?
2. Mount a fan on the roof vent to pull air out?

Has anyone tested to see what works best? I purchased a Beech lane 12v fridge cooling fan kit with a thermostat from amazon. Pretty nice kit ready to go.