Please help me!! Quick question!!!

I don't think this is the right place to post this but I am very new to the car-ish scene and I just got an amp and some subs and a wiring kit and I know I have to route the power cable from the + terminal of the battery through the car's firewall then to the amp.

My question is... Wtf is the car's firewall? Where is it what is it and what does it look like? :O Please help me!!!

The firewall is located between the engine and the cabin. as the name implies, it protects the passengers incase the engine should burst into flame. In the future, why don't you post in a forum that is actually specific to your car and actually has to do with car work, not news?