I just put two, not one but two (LOL) Sani-Tubes under the trailer, bolted to the frame. One holds the 20 foot hose and the other the backup 15 foot hose. I keep the connections in a black plastic cheapo tool box.
I got rid of my Rhino's. The connections are semi-permanent, making storage in the Sanitube impossible. Plus they developed pinholes after a month.
"Next to prayer, fishing is the most personal relationship of man"Calvin Coolidge
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS