The 2012-2015 LC 200 isntalls excatly as shown in our video linked here.
The 2009-11 LC and 2007-08 LC versions require you to make conenctions behind both the factory radio.
See our install supplement for the 2007-08 LC here.
And the 2009-11 LC here.
Carefully obersve our images on these supplements and note which wires need to go in the radio versus the screen. We label them clearly in the top right. Of course, you can email or call us with any questions.
The dissassembly process is virtually identical to our video.