Well since he did all ready did it, he'll soon have the answer as to whether it damaged anything!
I'd be more concerned about the coil, but same answer.
What he really needs to do is put the battery on the charger before starting.
I aint getting in that one. LOL.
You did good. Told the guy to trace the wires. Told him the colors didn't match and all that. That's the only way the guy is going to learn what he's got.