Help y'all, please.

My driver's side door mirror is loose and I worry about it coming off at speed. It's held together so far, but I'm concerned that the wind will catch it wrong and I don't want to take the chance.

I need help getting to it so I can figure out what's wrong. I just bought the car, so I want to make sure to ask the experts as to how to get to it. Since y'all are more mechanically inclined than me, could you help?

It's the top part of the mirror housing, where the glass and such are held. The support tied to the door seems to be okay and solid, but I don't want to start messing things up and have to buy a new mirror.

Thanks.

 

Nothing mechanical about a mirror being held to the door lol. As long as its fully attached I don't see it flying off, there should be a bit of play in the mirror.

 

Right, but it likes to shake when it goes over speed bumps. I just want to know if I can tighten it in any way.