Stereo Antenna Harness Adapter for Installing a New Radio Into a Mazda, CX-9, 2010, 2011, 2012, 2013, 2014 Antenna adapter for installing a new Radio into a MAZDA CX-9 2010, 2011, 2012, 2013, 2014 CarXtc adapter plugs directly into the antenna wire beyond the radio found in a CX-9 Plugs directly into your vehicle radio antenna harness behind the factory radio. Blue wire connects to the amp/antenna wire on the radio's harness Antenna adapter is needed for your MAZDA CX-9 10, 11, 12, 13, 14 If installing an FM modulator you will need this and the reverse antenna adapter