We installed the overflow water line for the rear water tank today. These are the pictures of what we did and how easy it was to do. It should be fairly self explanatory.
Basically we waited long enough to see where the water was going to level off at from the input point to where we wanted it to drain out of the tank from. Then we used my Swiss Army Champ knife to carve a hole to install the hose adapter and seal. Then we attached a hose and ran it back to the main creek. And VIOLA done 🙂