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I've got a 2012 Equinox that I want to attach an inviscord to the Onstar wires, but I am not sure how to access the wires. There is a wide black plastic cover where the rear view mirror attaches to the vehicle. I believe this cover is holding the wiring along with the sensors for forward collision detection and lane departure detection. As I don't want to break anything I was hoping to get some instruction to take this apart.

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