I have a 92 Buick LeSabre and i bought a new Cd player to replace the old casette player. I have the dash off and the old radio out but im having trouble hooking the new one up. There is alot more cords coming out of the dash than the new radio has. I have to cut wires and hook em together but the colors are not matching i dont know what colors are for what. The manual for the new player says what the colors are for but i dont know what cord coming out of the dash goes to the back right speaker and what goes to back left speaker and what one is positive and negitive. Is there a chart somewhere that tells me what color is for what part?