Hello, I just bought a 08 Mazda 3 and Im going to install a LOC and an amp for some aftermarket speakers with my stock radio. I looked through out my owners manual and found nothing on radio security codes. I also have no codes for the radio...

Does this mean I have no security code on my radio? I dont want to go through the installation process and accidentally brick my radio.

If it does have a security code, what triggers it?

Thanks