Gilljr,  can't tell you where to look on a DRV 5er but I would suggest you look at the outside opening for the refrigerator. There you should see a clear 1/4 inch water line that comes from somewhere, goes to a water valve solenoid (mine is blue plastic and has a couple of wires hooked to it and a water in and out connection), and then goes up the refrigerator to where the ice maker connection is.

If you can tell where the 1/4 inch line that goes to the solenoid comes from, that will give you an idea where to look. Mine goes through a hole in the board that the refrigerator sits on. That told me to go inside the 5er and take off the board covering an open space under the refrigerator, and sure enough, right in that space was where they had tapped into the water line running to the sink, and installed the ice maker water shut off valve.

Good luck

Lance