Big Three Upgrade Questions

[michaelking 10+ year member]

What I am wanting to do is perform the big three upgrade, then buy a high output alternator, and then replace my battery with a red top optima battery. I have a few questions regarding the big three.

1)It seems that I have two cables coming from my positive battery terminal (One to alternator and another to fuse box). On my negative terminal I have two cables also (One going to car chassis and another going to a bolt that is located near the alternator on a slab of metal-not really sure if this part of the alternator or not). SO my question is, do I need to upgrade all of these cables (4 total)?

2)When adding new cable do am I going to need to remove the stock wires? If not than how will I run the new wires alongised the stock ones? Will I attach the new wires to the terminals? The type of terminals I have are the ones that have go on top of the battery posts and then are secured in place with a screw and bolt. Will I run it the same way I have ran my amp power wire, just attach ring terminals to screw and secure down with bolt?

3)I plan on buying a high output alternator for my car. The specs for the alternator require the power wire from battery to be replaced to a 2 gauge wire. So does that mean I will completely remove the stock power wire and use a new one or just run it alongside the existing power wire and attach both power wires to alternator (Similar to above question).

Sorry about the questions, I'm just trying to make sure that I am sure about everything before I begin. As you can already tell, I am a newb when it comes to cars.

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[99grandprixGT 5,000+ posts]

do not remove your factory wireing! run it along with the 1/0 new wire for the big 3.