Broken Backlight for Air Level Select [Toyota Corolla Sport 2009]

#1
The backlight for my Air Level Selector is broken. It works just fine, but when it's dark outside I can't see it.

By the air level selector I mean the selector between the AC/heat air vent selector (w. recirculate air button) and the heater vs air conditioner knob (w. AC selector button).

Question:

I. I'm having trouble getting anywhere with Google on this one. I probably have the wrong terminology. What's the correct name for this knob / selector?

II. What would fixing the backlight entail?
 

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