How to disable WiFi on the MR1100

First, join the WiFi of the modem directly.  If you have another router or mesh network installed with the same SSID and password then unplug your router/mesh system to make sure you are connecting to the modem directly.

Next you'll want to go to the following address: 192.168.5.1 or
192.168.1.1

The user name is "admin" and the password should be "kpadmin" unless you have changed it after your installation

Press the button in the upper right corner with the 3 lines to open the menu.

Choose "settings" -> "setup" ->"wifi profiles"

From this screen, you can choose to disable the wifi on the modem.