If key fob battery is dead there is a location inside the center console. See the manual.
The key blank does nothing. In the event the 12 volt battery dies there is an access panel in the front bumper. See the manual.

 

The keys are blank because there is no place to use them.
If the 12v battery is dead there is an external access that you can attach a charger. That will pop the hood and allow you to get to the battery. (See YouTube or manual)

1. Get phone as a key working and always carry it when your driving.
2. If the key fob battery is dead, use your phone.
3. It is unlikely that the fob would go dead along with the phone.
I would recommend buying a second fob. (I paid $275). Leave it at home for emergencies.

 

There is a slot for the fob at the front inside of the center console. I do not know whether that will allow you to start the car with a dead fob battery, but the locksmith who programed my 2nd fob used the slot when programing the fob. An additional entry method is the 5 digit door code and then start the car using the 8 digit security code which you can set up after you set up PAAK.

 

the blanks are blanks, and there is no key hole..... check manual for instructions to get in car with a dead car battery.....

 

The keyfob key blank is meant to provide a slot for attaching a key ring. If your keyfob battery dies, start the car using the backup key code.

You don’t need PaaK or a keyfob to start your MME.