I started my Infinity 6.5 speaker install today and after checking came up with two different color codes for S10 cc...neither matched my stock wiring exactly. An easy way to check the polarity of your speaker wires is with a voltmeter. Set the voltmeter on it's proper dc setting, turn on the radio to energize the speaker wire. Stick your probes onto the speaker wires and see if you have a minus - in front of the voltage, if you do they are reversed, when there is no minus the wire you have the red probe on is the Positive + wire. You can test your meter out by popping your hood and testing it on your battery.