Popped 2x 350-watt Kenwoods out of my sister's totalled car. I popped out the stock AM/FM unit and I'd like to know where to wire the two speaker wires into so I can hear what they sound like. Or would it be easier to pop off a door panel and connect from there?

 

Door panel FTW!

I would recommend the use of spk harnesses. Much easier and cleaner.