Hi! We just bought a used 2022 crosstrail 23xg from a private seller and brought it up from Florida. unfortunately, they didn't have to worry about winterizing or draining the tanks so when they gave us the walk through, we didn't know this information. Now, the fresh water tank froze and when we took it out in warmer weather and turned on the water pump, water came out of the floor vent next to the bathroom. I still can't figure out how to drain the fresh water tank. I know about the valves behind the oven drawer but i'm not sure how to use them or what they do. a diagram or step by step for this exact model would be extremely helpful. thanks so much!