wiring on starter

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Help. I have a 1972 Chevy Blazer with a 350 engine and HEI. The problem is; My Blazer wouldn't start so a friend went out to look at it. While he was looking he noticed a burnt wire on the starter solenoid. He replaced the burnt wire and spliced it into the wrong wire. He pulled a bunch of wiring around so now I don't have a clue as to where to begin looking for the other end to the wire. I can't even remember if there's 3 wires coming off the solenoid or 2? The only one I know for sure is the one that runs right to the battery.