Find the water access point on the refrigerator. Some fridges have it at the end of tubing outside the compressor compartment cover, and others need the cover to be removed. There will be a plastic cap at the connection; pull this off.
Place the compression nut and ferrule onto the plastic tubing. Insert the tubing into the water valve connection on the fridge and tighten the fitting.
Clamp the tubing to the clamp on the back of the fridge to secure the tubing.
Reattach the access cover.
Repeat Step 2 at the wall. Attach the fitting to the wall outlet and open the valve at the wall.
Check for leaks, push the refrigerator back to the wall and turn it on. Start the icemaker and discard the first batch of ice to clear any sediment in the line.
Run the water dispenser for a few minutes before drinking the water to clear the line.