Thank you for all the fast responses!
Update. I creeped around underneath, even remove part of the plastic and couldn't find anything.
I was able to find the PO's notes for winterizing, found the water heater and 2 lines with plugs sticking out the rear just before the bumper.. Pulled em and some pink anti-freeze came out.
I was talking to a friend with some more knowledge and he pointed out a line that looked like the 2 at the rear but it was next to the waste drain. At first we thought it was a hookup for the waste tank rinse.
20160509_190004 by
OutlawLine in question next to waste drain.
20160509_181340 by
Outlaw