I don't understand the need.. but who am I to question your quest.

Here is a link to stereo installs.. don't know how much reading you've done but there are several threads on the stereo and various setup's. Search for "4 channel" and you will find amp wiring details.
https://www.crossfireforum.org/forum...et-stereo.html
I was bored and did the footwork for you.. Need a desktop shortcut anyways..
https://www.crossfireforum.org/forum...-channels.html