Negative side cables

[ChilinMichael]

I'm going to be redoing the negative (ground) to top post, the stock obviously won't reach up there. I'm going to strap the close body ground with 1/0 gauge that I already have, could someone tell me where the other leads to? I see it going down towards the engine but I don't know exactly where. I'll be replacing this with 4-gauge.

For info, I'm getting Raptor brand top-terminals. Positive has a digital volt readout, (1) 1/0 gauge (which will be my alternator that already has that gauge), (1) 4 gauge (which will go to Maxifuse loomed), (2) 8 gauge, which will be my new gear-reduced starter and the other the self-powered subwoofer in the trunk.

The negative side has the same (1) 1/0, (1) 4 gauge, (2) 8 gauge.