here's walmarts reply
We got in touch with the manufacturer, they said not to use the metal arm and it will work.
On Fri, May 19, 2017 at 5:46 PM, Thomas Pfaff <c-F0794415EE8541DD96809B85A27366ED@relay.walmart.com
Hi Desir Group LLC,
Thomas Pfaff wants to connect with you regarding the following order:
Sales Order ID: 4061791346348
Item ID: 435828184
Item: KitchenAid Replacement Refrigerator / Freezer Ice Maker 2198597
I ordered ice maker OEM part# 2198597. you substituted an after market ice maker part# IM597. IM597 is not compatible with my refrigerator because my machine uses an OPTIC light to signal a refill cycle and your IM597 uses a metal arm which is not compatible with my machine. I checked with Appliance parts pros.com
and they advised me that IM597 is not an acceptable replacement for my OEM#2198597, because of the OPTIC light system in my machine. If you do not stock the OEM part I will need to return your substitute IM597 for a full refund. Thank you for your consideration and understanding of this issue.