"Rear" Signal for an Emerald module

Hi there!
I'm installing a CDR31 A/V Module for my Cayenne but I can't find the "rear" signal at the dashboard... Would someone around please help me with this?
TIA!
I'm installing a CDR31 A/V Module for my Cayenne but I can't find the "rear" signal at the dashboard... Would someone around please help me with this?
TIA!