screw

Hi there. I recently purchased a 340 sedan bridge and the fridge seems very noise when its running... I think it just needs to be cleaned but i dont know how to get it out of there. My sea ray manual said to loosen the screw's attaching it to the floor. Well I can't find any screws...

I have a 2006 sea ray sport 185 that has a plastic tank. The fuel line running from the tank has a bracket screwed directly into the tank with a metal screw! I bought this boat used, but to my knowledge, this is how the boat came from the factory. Is there anything to worry about? Leaks...