The Big 3 Upgrade

[spyder_013]

Alright, after adding my sound system, my next job is to upgrade the Big 3. I am using 1/0 AWG wire all the way around for it. I did some searching on here, and couldn't find my specific answer, maybe I searched the wrong things, so... here goes:

Ok, the Battery Negative to Chasis is easy, but the Chasis to Engine is the one that is a bit confusing to me. I have the 2.2l Ecotec in my '03 Alero, where do I ground from? Many guides/forums I looked at said to ground off of one of the mounting bolts of the Alternator, but the little info I found on here said to use a Transmission bolt, but I don't really know what bolt to use?

I feel the Alt + to the Batt + is pretty easy, I just have to add a wire to where that boot is on the Alt that says "Batt +", correct?

Thanks!