EWWWW! Good luck with this one. the piping in the newer ones is made of a material called PEX which is more forgiving when freezing than standard PVC and fastened with special crimp on connections (which can be sub'd with hose clamps). Unfortunately, there are no specific diagrams for water lines that would pertain to your particular unit, only general water pipe diagrams. The good part is that they are generally all in one small space unless you have a second bathroom or something. Also, if you did not winterize properly, it could have froze and caused a leak, usually where it joins a metal piece or solid plastic piece.
By the way, We visited the Emerald Hollow Mine last time we were there, nice town and very friendly folks!
Welcome to the forum and good luck with your leak.
PS: I don't know why Dutchmen can't come up with an owner's manual like this one...