Adding an inline converter

I know it is possible to add an in line converter (like the Scosche
SLC-4) to the stereo system in my 2000 Limited Convertible, but before I
take apart the dash, I'd like to see the internal wiring in a diagram.
Much searching throughout the internet has come up empty, and the auto
parts stores only have books up to the 1998 models. Do you have any advice?

Thank you,