Read the last paragraph, right above those pictures...
Mine wasn't quite as easy as that. When I popped mine off, it was still attatched to the power pack plate and rubber grommet. I took off the grommet to see that the center ball was broken off from it's mount on the inside. It had stayed in place as the plate also pops over the motor arms inside. So I put some JB weld on the ball end where it pulled away and snapped the mirror back into the arms. Then went along with the install as normal.
It talks about something broken that needed glued back together... might you get that lucky?