Grey water tank input connection

[Thurman]

About two months ago I had to replace both the grey and black water valves on my unit. At this time I found that the grey tank had come loose from it's rear support bracket and repaired this also. This weekend we did a four day camp and on the second day I noticed water dripping out from under my unit, very close to the area of the grey water tank. Due to that darned sheet metal cover they put all over the bottom of this unit I could not actually see what was causing this leak. I did drain the grey water tank into the "Blue Boy" (the name one camper used) and there was maybe 12-15 gallons came out. I'm not suspecting that when the tank support dropped, the rear of the grey tank dropped, this may have damaged a connection at the top of the grey tank. Does anyone happen to know how they connect the grey water piping into the top of these tanks before I go tearing everything under there out? Forest River may have thought this "Under-belly covering' was a good idea, but I (for one) do not like this stuff when I am having to access the plumbing.