Wiring diagrams for a 2000 honda accord?

I've been trying to install a new head unit by splicing the wires, (I know it isn't recommended) and i've figured out all the wires on the stereo but I can't seem to find a diagram that is accurate for my car, there's 2 wires missing in the diagrams, a black wire and a blue wire, also usually the black wire is the ground wire right? Well in this case there's 2 black wires and i'm at odds on what the extra black and blue wires are for

Son, installing an aftermarket head unit is a piece of cake. Get some 18 AWG but connectors and crimp any extra ends to prevent the wires from shorting out.

This photo can help you.

Try this site: http://www.the12volt.com/installbay/stereodetail/1040.html

Color code in cars is not universal.