Hi,
There should be a total of 6 connectors with the c2280 followed by a letter. If you look at the last pic below, it shows the smart junction box. I highlighted what I believe you are referring to. Those are circuit connectors to the SJB. Each pin in the connector completes a circuit for a different component.
If you look at pics 1-6, they show each C2280 connector and identify what each pin is used for.
I hope this helps. Let me know if you have other questions.
Take care,
Joe
See pics below.
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Friday, July 2nd, 2021 AT 8:28 PM