You don't say what brand of W/D you have, but if you have a Splendide, the instructions for winterization are in the manual. The manual is available on the Westland Sales web site (US distributor for Splendide) HERE
You also don't say what brand and model refrigerator you have, but most of the icemakers are the same. We have a Norcold, so that's the make I am most familiar with. Again, winterization instructions are in the manual. HERE
is a link to the operation manual of a Norcold 1200 fridge. Winterization instructions are all the way at the end of the manual. As I said, most icemakers are the same and winterization procedures should be similar even if you have a different make and/or model refrigerator. When I used to winterize our icemaker, I added a step to run RV antifreeze through the solenoid valve with the line from the solenoid to the icemaker itself disconnected. That way, I got antifreeze into the valve, but not into the ice mold.