winterizing '16 Jayco Pinnacle 38FLSA

We have one more trip planned and it will be time. Don't think the new coach will be much different than our old one when it comes to winterizing with a couple exceptions and hoping someone here can help me out. The Pinnacle has a residential fridge, so a bypass kit for the water filter is offered by Frigidaire so that should work. Question is around the washer/dryer prep. We don't have a unit installed but I'm sure there is plumbing in the closet where the unit would be. How have others winterized these lines?