Yes, the low point drain valves are located in the cabinet below the wardrobe in the bathroom. If they are OEM, they have "T" handles that you pull up to open and push down to close. The outside discharge point is at the door side rear corner on the outside of the frame rail.

If you look at my Gallery, I posted a picture of the inside valves and the outside discharge points.

Hello Fred. Do you happen to know if your unit has low water drains?