that clicking is most likely a relay. the two you're touching together are "could be" a safety circuit of some type (brake switch etc). A kill switch will let you crank, but not fire. a safety switch will prevent the engine from cranking. ditto Tom's advice on wire color. make no assumptions with these. On mine, black is hot, green is ground. There should be aground attached to an engine case bolt find that, trace it back, it should lead to a junction of the same color wires all together. that's your ground color then. figure that out first to avoid doing any damage. On your ignition coil that goes to the spark plug will be a ground and a hot plugged in on the terminals. once you know the ground color, the other color on the coil is your primary 12v hot wire color. everything else becomes secondary source wiring after figuring those two out.
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