How do you disconnect the wiring connector in the rear view mirror stalk......underneath the black plastic cover. I want to tap the wiring for a radar unit but need to tap the wires going down into the mirror since there is no room on the top of the connector (under the cover). I need a description of the mechanical manipulation to separate the upper and lower parts of the connection (there seems to be a black and a red component ) Thanks.....sorry, I have an 09 XF-SC