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Hello my name is ***** ***** I will be trying to help you resolve your issue. You need to know how this switch is electrically controlled?
Auto Transfer Switches work by allowing your utility power to power your house, when the utility power fails (outage, Fallen tree limb on the line) the switch automatically lets the generator power the house until the utility power comes back on, then it will switch back and start using utility power again.
I have attached a wiring diagram here that I finally as able to get from them. I am sorry it took so long.