For Installing an aftermarket car radioWires are color coded to match you new aftermarket radio - Carxtc wiring makes your installation quicker No need to tap or cut into factory harness Match color wire to same color on new radio harness Plugs into car harness and then other end into new radio. Fits NISSAN ALTIMA 2007 to 2012 07 08 09 10 11 12 2007 2008 2009 2010 2011 2012