Here are the pictures of my current Big 3 wiring setup. Keep in mind the power wire from the Alt to the Post Post on the fuse box will be replaced by a 1/0ga wire with a Maxi fuse added to it to prevent any short circuiting.

First is the negative post to the chassis. I choose the same location that factory uses to ground their connection. I just sanded off the paint to make a better connection.



Second is the one from the Alternator post connected to the strut tower brace to provide the 2nd grounding.



Third is the black wire coming from the Alternator to the Fuse Box post to provide the direct power link. That is the one I will be eventually changing out.



I hope this helps you to better understand the Big Three wiring for our cars