Safe to vent fridge from inside?

I found a FR from 2012 that showed the refer in the center of the RV. I have 40 years as an RV tech and have never seen such a set up. But, to answer your question. IF the access panel is to access the rear lower area of the refer where the connections and control box and LP is connected-----NO, do not leave that panel loose. When installed, it allows the bottom floor vent access to allow fresh air to come UP from the bottom of the RV and up thru the roof. If left OFF, you will disrupt the required air flow up the backside of the refer and will pull inside air also. The BEST way for a rear 12 volt fan is at the TOP to PULL fresh air up and out. If you have a fan at the bottom, that is OK, but you are not getting the full amount of cool air. It is better to PULL( roof top area fan) than to PUSH air up. You want the fresh air to flow THRU the upper rear Condensor fins. Knowing FR, I doubt they installed this refer per the Refer makers instructions. You want NO gap between the upper Condensor and the wall on the backside of the refer. I would go up on the roof and remove the roof top vent and look at how FR built the baffles(if they even installed the required baffles) to make all fresh air run thru the Condensor fins. If there is a gap between the fins and the wood wall, make a wood baffle to force all air thru the fins. Doug