Installing backup camera on android eonon stereo model #GA9463B on 2012 Mazda3.
Should Be same process for 2010-2013 mazda3.
Splicing into factory wiring: https://youtu.be/ciu80ZqKBHA
USB ports for center console: https://amzn.to/3rsCdtS
T tap wire connectors for tapping into existing factory wires without damage: https://amzn.to/3oN5JIY
Eonon radio website: https://www.awin1.com/cread.php?awinmid=32471&awinaffid=1453586
Updated: Eonon's Latest Mazda3 radio: https://tidd.ly/3JfX1Q0
Use coupon code “SPARKY10” for $10 coupon on eonon website