FC S5 89: Alternator wiring... Confirm or correct me if this is right ???
 

I'm upgrading my alternator from a stock 80 amp to 120amp. I took the stock alternator and brought it to a shop to get it upgraded and I have a Mazda Racing pulley... I have read the entire thread that jackhild59 started. I really like his post on page 9, #212 (https://www.rx7club.com/2nd-generati...-785082/page9/)

Yes, he uses a Ford Taurus alternator... I'm aware of all the pros and cons that are explained about the rewound alternator in the other pages... He did his swap and custom bracket, I'm doing my own experimental thing.

It's been years since I relocated my battery in the trunk so I need some help refreshing my memory.

I need some clarification about the main wire... In picture 1, the loop terminal at the left that has 2 wires coming out, goes on the alternator. The other loop terminal on the right goes on the battery and that black connector is what ??? I'm guessing a ground... Is it a ground or another power wire ?

In picture 2, is my alternator. I'm using 2x 4 gauge wires with separate terminal loops since I cant find one big enough for both wires. I'm about to connect the power wire to a 150 amp fuse that's bolted on my firewall and have 0/1 gauge wire going from the fuse block to the battery in the trunk. Do I ground the other wire from the alternator ?

Also since my battery now has 0/1 gauge power wire. Should my battery ground wire also be 0/1 or 4 gauge ?

Here is a description of what I just did.
Ripped out the battery harness.
Now the positive from battery in bin goes to Starter,up to the Fuse block.
Alternator goes to Other side of fuse block,also has that black connector on it to go to the Main driver's side harness,(that powers the Ignition.)
you do not Ground any of the wires that GO to the alternator.
NOW..Ground:..I ran a ground from the Center Iron to the Driver's side Frame.
In the Passenger bin you will see 2 silver bolts on the backside left..make a patch to that..and then Out of the Bin and back to the Starter bolt.(plenty of reassurance on ground now..lol)
I just started the car up today,,it had a Hell of a time starting,been down 3 months BUT I never killed the battery,.,and I DID get the car started!!!