I agree completely with what Grumpy said.
In our Leprechaun (different model and different year) there is a wooden grill at the base of the kitchen cabinets. Above the grill is a sticker that reads "Low Point Drains". The three hoses that Grumpy talked about and their valves are behind that grill. The blue one is the fresh water tank drain in ours. The fresh tank is under the fridge, right next to this grill.
Don't know if this will help in your search.