I am headed out tomorrow so for now I made a bracket to hold a fan at the bottom of the frig. pointing up. Ran it all day with very hot amb temps and the frig. remained below 37 degrees with the temp setting on 6. I just used an alligator clip to pick power of the control board and ground on a bracket. When I get back I will fix it proper.
I like what Dennis and Executive have done. So I am thinking about making a fan bucket that will fit in the vent at the top. I am thinking about just cutting the plastic screen out, fit the bucket in place and drill through the plastic into the fan bucket to secure. Cover with metal screen and be done with it.
Based on what I am hearing I may need to shock isolate the fans from each other to reduce noise. Maybe I will get fancy and add a microprocessor to monitor temperature and progressively turn on fans as needed. That way at night the fans could be turned off one at a time based on the ambient temperature so it's nice and quiet.