In the same way, pull out the inner pivot point.
Unhook the drive rod with a screwdriver.
Remove mirror glass.
Attach the new mirror glass to the drive shaft.
Fix the inner pivot point.
Align the outer pivot point and press the mirror glass into the body until it locks into the outer pivot point.
Precautions: when pressing the glass of the mirror, be sure to wear gloves or place a clean cloth so as not to hurt your hands.