Hi, I have a Coleman 1850 generator. I am repairing some damage done by rats chewing thru some wires. As I look at the off/Run switch, all are intact except a short black wire that I can not find where it goes. I assumed it was a ground/off wire, but grounding it does not kill or turn off the engine and I continue to have the green power available light illuminated even in the off position. Can you tell me where to attach this black wire please?