I had a PM asking for pics and instructions for the Blendmount/Invisicord install, so I figured I'd post it here for all to see.
If wiring to the rear-view mirror wiring, I highly recommend the Blendmount or a similar secure mount, NOT the suction cups as they tend to lose their grip over time, especially in seasonal temperature areas. The BlendMount is a very straightforward clamp-type mount that clamps on to the rod holding the rear-view mirror. There are various adjustments that can be made including height and angle.
The Invisicord wires into the mirror power connector inside the black channel running from the mirror to the roof. The black channel covers just pop off. I wired the Invisicord to the connector coming down from the roof, not up from the mirror because the pins fit easier. For my install, the yellow pin (12V) connects to the blue wire. The black pin (ground) connects to the white wire. Check your wires with a voltmeter to make sure which is which. The pins can easily be removed later if you wish.
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