Audio Systems: Installing sub in a 98 blazer, haynes repair manual, speaker wiring

Question
I have a 98 blazer but I am keeping the standard cd player in it and i need to know what the wiring in the cd player is because I have a connection but i dont know the rear speaker wiring is.  Can you help me?  

Answer
Eric,

 i normally dont recommend installing any aftermarket equipment with a stock head unit just because it premits a few problems and it gives bad quality of sound compared to an aftermarket unit .. but i do have a personal wire diagram str8 from a haynes repair manual you can download from my site and it also has some handy info for wiring up subwoofers ect.. and also i have a website that has a more "easy" approach

www.geocities.com/evilparadise02/stereo.html
www.streetdreams.com/wires/