In the setup guide
You can assign a key to your profile during the setup guide. When it's time, place your key on the backup key reader and follow the instructions in the center display. You can also do this later in profile settings.
Tip
Assign a key to your profile so that your profile is automatically selected when you unlock the vehicle or open the driver's door using the key. If you use a key that's not assigned to any profile, the most recently used profile will be selected.
Assigning a key to a profile in Profile settings
Press the vehicle symbol 
in the bottom bar and go to Settings.
in the bottom bar and go to Settings.Tip
You can also press the profile symbol at the top for quicker access to profile settings.
Go to .
Select the key you want to assign and follow the instructions in the center display.
Note
If the key is already assigned to another profile, it will be moved to your profile instead.