Retains factory back-up camera to an aftermarket radio. Allows an aftermarket camera to be added to the factory screen includes AX-CAM6V 12V to 6V converter compatible with Mazda(R) CX-5 2013-2015, CX-7 2007-2012, CX-9 2013-2015, CX-9 (with navy) 2007-20. To retain the factory backup camera to an aftermarket radio = Connect the Black wire to chassis ground, and also to the Black wire of the AX-CAM6V. Connect the Yellow wire to the Blue/Red wire of the AX-CAM6V.Connect the reverse wire from the aftermarket radio, to the reverse signal in the vehicle,and also to the Blue/White wire of the AX-CAM6V. Connect the male Yellow RCA jack to the rear camera input of the aftermarket radio.