Help! Want to tap power that feeds OEM Bluetooth mic

[VVT4ME]

So...I want to install a couple small led's in the panel that houses the factory Bluetooth mic in the headliner. I saw someone do it, and it looked good....I also drive older BMWs and mine always had small orange ambient led's in the headliner that simply kept the center console dimly lit and made it nice if you had to fumble around at night looking for something you dropped. So.....I want to tap the wires going to the mic. They guy that did it said he just hooked up 'positive and negative'....But I have read that the red and white wires are actually left and right, because it's a stereo mic. (There is also a black wire I have seen in photos). So.......what I want to know is....if I want to tap the mics power, do I tap red and white or red and black? I know the set up works, I saw photos of the finished product lit up. So can anyone help?

[Gunman]

Why not tap into the rear view mirror power?

[Mr.ac]

Not to be an ass, but why not just put a brighter led dome light.
Seems like too much work for cheap fix with the results.