The factory security functions are managed by the Body Control Module (BCM) where we need to make the connections. The BCM is located behind the radio.

Starting at the bottom, pull to disengage the trim bezel clips.
Disconnect the electrical connectors from the center trim bezel

Remove the Radio.
We need connector C1 Light green 27 pins

and C3 light blue 25 pins.

Both show the end that goes into the BCM so be sure to count the opposite for looking at the back.