Gen 2 base model 2007 how are the tweeters wired through the front speakers

Hey,

Putting my new stereo system together on paper and I read a couple threads about the front speakers are wired through the tweeters first then the front door speakers. It was not clarified if there is a crossover separating the frequencies in the stock wiring or how they work, can anyone shed some light on what's in my doors so I can order what I need to upgrade the tweeters and the 6.5 inch speakers? If you guys know how deep the speakers front and rear doors can go it would be a big help in my picking the right speakers. I already have the 4 channel amp, 100 watts per channel class D amp I am going to use.

Thanks!

 

Anyone?