Battery positive (+) to alternator - From the positive terminal on your battery to the alternator positive (+) post
Engine block to chassis ground - From engine block to bare chassis metal. This is to complete the circuit of the alternator itself, allowing for a stronger ground.
Battery ground (-) to chassis ground - From the negative terminal on your battery to your car's chassis
I got the Big 3 finished for now, I will put 0 gauge from battery to chassis when necessary the 4 gauge is less than a foot so I'm good, but I have the triple 4 gauge run from block to chassis. Today I ran the 0 gauge from alternator to battery. Its a bit overkill but I didn't want to regret doing it in 4 gauge and I have a lot of 0 gauge around.
Less resistance, Less Voltage drop (not verified) just shorter, thicker and better quality wire. Will add a 10 or 20 farad cap in the future.