replace whole side mirror mount 2015 malibu

I broke off the driver side mirror (whole mirror frame) on 2015 chevy Malibu. I need instructions on how to open inside panel to get access to mirror mount since mirror mounting pins sheered off and are stuck in mounting holes. I can't find any instructions on web or how to videos for this new car. Does anyone know how?

here is a video of a mirror replacement on an older model. While it may not be exactly the same it should be very similar

https://www.youtube.com/watch?v=0clRPk-Ta1g