Installing a New Solenoid on Mower?

I have a Yard Machine that I bought and they said it wouldn't start and someone had replaced the starter and solenoid. I tinkered with it and found the solenoid was still bad so I'm installing the new one and now I forgot which wire goes where. I know the power from battery goes to one side and power to starter goes to the other. Then the igniting switch to the little side post. But there's a green wire that I have no idea where it went.