No useable wires near mirror.
Remove A-Pillar cover and run the wire there to the fuse box.
You may use a thick black wire with a red stripe on it, which is coming from ignition lock to the fuse box to tap the power. Don't use the supplied wire tapper as it is not designed for a wire of this thikness. For the ground, there is a grounding spot to the right of the MPX (Pink Box) module.