1999 mitsubishi eclipse/spyder

Okay, so I've looked at the wiring diagram on this site, it doesn't match mine. The label on my radio says April 1999. I've looked everywhere on the internet. I was hoping some one can help me out. See, I don't understand how you can have a (Black) wire for both the (left front -) and the (right front -). Or a (BLACK/ White) wire for both the (left front +) and the (right front +). Here's the link to the site's diagram: https://www.the12volt.com/installbay/stereodetail/1546.html Here's what I have: https://img.photobucket.com/albums/v198/Sephiroth91/Diagram.png https://img.photobucket.com/albums/v198/Sephiroth91/Diagram1.png Suggestions?

I'm looking for a radio diagram, sorry.