Hi guys need help Camry 2003 sound set up

[mk3_coolj]

I have a Toyota Camry 2003 model Le 4 cyl. I would like to add an ampli and a ported subs and I want to use the factory stereo I had the loc ampli and subs but someone told me that there is a factory ampli in my car that need to bypass and I'm not sure where is it and how to do it do I need to bypass the factory ampli or I just do is connect the loc in the speaker wire and ampli cable to the battery also in my loc I don't have this blue wire the remote turn on how will I put this additional wire so it will not discharge my battery

It will be great if someone can explain the wiring behind the stereo

I really appriciate your help

Regards,

Mk3_CoolJ

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