Best way to hook up sewer hoses for two holding tank?

You can use a 3" wye at the CG connections and run hoses from each drain to wye


You can run hose from one drain to wye and then one hose to CG connection


You can run one hose from front drain (black/grey) tanks to CG connection and use a drain cap with garden hose connection, run garden hose to fitting that 3" hose connects to and has a plugged connection for garden hose (if rear tank is grey)





Depends on what you want to carry around/stow