Thank you for the advice. Sorry if I missed the threads about this... I swear I did plenty of searches.
Anyhow, I finally was able to figure out the mounting bracket that Crutchfield gave me with my 6.5" Rockfords and I decided to clip the harness (even though Metra emailed me the correct item# 72-5602). Also, I added some dynamat to the door but I read that only covering 25-40% of the inside of your door gives you the best results. Not sure what the reasoning is behind that. But I put about a piece above the door brace and one below.
I watched plenty of soldering videos and I think I am ready to go. I'll give it a shot today. Thanks again.