I feel like an idiot...

ok..Thats what I thought...Run it with the big wire..You have made my decision more reassuring. That small red wire in question does terminate at the starter relay on the big terminal with 2 other wires. I guess a lot of things get power from that feed off the battery. Thats what i am gonna do in the morning..Hopefully have my new engine running by monday or sunday night!!! Still gotta install exhaust and accessories on front of motor.