How do you know what speaker wires go to what speakers on a 95 mystique?

There is a color code for the speaker wires in a 1995 Mercury Mystique. The radio battery constant 12v+ wire is orange/black, the radio accessory switched 12v+ wire is blue/black, the radio ground wire is black/green, and the illumination wire is white/green. The left front speaker wire (+) is white/black, the left front speaker wire (-) is brown/yellow, the right front speaker wire (+) is white/red, and the right front speaker wire (-) is brown/red. The left rear speaker wire (+) is white/violet, the left rear speaker wire (-) is brown/white, the right rear speaker wire (+) is white/violet, and the right rear speaker wire (-) is brown/white.