I have not yet got to see one of those new extruder connectors to help you. But I would look in the connector that plugs into the pictured connector and see if there is a pin missing in it.
You should have two male pins extending out of the printer side connector for keying the connection. I am not sure if those pins are used for the single extruder tool head…
Fortunately those are just guide pins to make sure that you don’t plug the connector in backwards. they have no function with current. Please just plug the connector back in and the printer will work properly.