The two hoses are the low-point drains.
On the inside of the coach look for a panel or drawer that you can remove that is in the same spot as the water heater is on the outside. On our Cougar the water heater was below the stove. There was a panel with two screws that I could remove to get to the winterizing valves there.
Likewise with the drain: Find where your freshwater tank is and look underneath it or near it. Since the unit is older it is possible that a previous owner did something with the drain as well.