Hi guys and girls

I've got a 1978 Firebird Esprit that i just dropped a second gen Chevy 350 into.  The group of wires that come through the driver's side firewall, right behind the brake booster, have mostly been cut back to within 5 or 6 inches of the firewall.  I dont know which ones are supposed to go to the starter, and I was wondering if anyone out there could give me some advice.

Thanks