Also on the antifreeze port suction hose, even though there is a cap on the end of the line, I would go ahead and turn it's valve handle 90 degrees too, just in case.
I can't see good enough on the pic, but is the water filter canister attached. It's directly on the right hand side line as it comes from the water pump
2011 Flagstaff 831 RLBSS
I've reported my DNA missing just in case it's found somewhere bad.