I removed that piece but the mouse nest is actually down the HVAC intake hole which is behind the wiper motor. In the intake duct there is another plastic grate that prevents me from being able to access the nest from the top.

I did a bit more research today and it looks like I may be able to remove the blower motor and go up through the ducting with a clothes hangar that way. I’m not familiar with the ducting setup so I don’t know if that would lead to the right spot.