Passenger airbag

I have been removing the dashboard on my 2011 JK to replace the heater core. I have searched the YouTube videos and any write-ups and I have come up empty handed on how to get the passenger airbag out. I have separated every clip and the bag still seems to be held by something directly in the middle. If anyone has a picture or information on what is holding it I would greatly appreciate it. Thank you.

For future crazy people who think they want to remove the heater core (think here...tedious and challenging) from their 2011 JK, here is important piece of information. There is a 13mm nut that is double hidden from view. You have to twist the airbag cover to expose the vent ridge along the windshield. Find the plastic cover ( about 1" square) and pry it up and out. Look in the hole and you will see the 13mm nut. The rest of the heater core replacement is easy