Having a bit of a brain fart here....

I have 3 wires to connect to the starter, one big one is red (comes from battery?) one big is black (goes to c-500)?. and one small goes on the small post. Do I put both of the big ones on the left post? (Picture below)

(Harness made by FieroFlyer) I thought I'd give him a break from my questions, and I just wanted to ask a general question and I want to know if there is supposed to be a ground on the starter somewhere....

Nevermind, another brain fart, used search and found it in 3 seconds... the black is ground. goes on the bell housing bolt closest to starter.