I just purchased a 2014 328TS and it has a residential fridge and a combo washer and dryer. I am looking for the water hook ups or shutoff valves for both. The manual is generic and doesn't point them out.
I have the same year and model as you and the water shutoff valve for the Residential Fridge is behind the bottom drawer to right of the fridge. If you take out the bottom drawer, there is a white access cover in the very back that needs to be removed to get to the valve. I had to lay on the floor with a flashlight to find it.