I have to replace the Blower Motor regulator. So while accessing it, I noticed this door or flap above the blower motor. It moves when you grap it and swing it on it's hinges. So I got curious and was wondering what controlled it since it seemed so loose. On the backside/underside of this flap or door is a plastic linkage that is broken

I couldn't tell what it is supposed to be hooked to with my fingertips.

Is this as big a problem as I think it is?

If it stays in the position shown, can air circulate into the car?

I imagine I broke this some 3 years ago when I changed the blower.

Now to the PIC Link:


Also, I have a missing diverter as evidenced by the red arrow. The arrow is pointing at the one that is present. Is this available to buy now? What is it called?

Here's the PIC: