Here's what I see on page 8-167. Based on this diagram a 6ga wire on the alt goes to a "terminal block" where it Ys off to:
1) direct 6ga wire to ammeter;
2) to a 16ga fuse link/10ga wire to bulkhead connector then a 12ga wire in the cabin.
Is that terminal block called out just a post terminal with those 3 wires on ring connectors bolted on to it or a 3 lugged bus?
The red wire from the starter relay to ammeter is labeled A1A-16R. The last 3 characters 16R indicate a 16ga red wire or am I reading that wrong.
Your first answer was one part of the puzzle: yes I need a 6ga wire. Thanks for the prompt reply, really helps.