Enabling MoCA Privacy on Technicolor CGM4141

Hello everyone. I'm having some trouble enabling MoCA Privacy on my new cable modem from Cox. I can see on the configuration page that privacy is disabled:

However when I click Edit there is no option to enable privacy:

On my old Arris modem there was a checkbox to enable privacy which allowed you to put the PIN for your MoCA devices. Any advice? I would rather not install a PoE filter since the cable enters the house at a difficult to reach area... I also talked to phone support who said I should talk to Techincolor, but their support page says that the service provider will support the device in the U.S. 

Thanks in advance!