Where can I find the contents of FibreConnList?

Given a block of code,

if (messageType == typeof(FibreConnectorClass))
{
    FibreConnectorClass fibreconnect = (FibreConnectorClass)payload;
    fiberConnectorComboBox.Items.Clear();
    foreach (string var in fibreconnect.FibreConnList)
    {
        fiberConnectorComboBox.Items.Add(var);
    }

    //fiberConnectorComboBox.DataSource = fibreconnect.FibreConnList;
}

and the class file:

internal sealed class FibreConnectorClass
{
    internal FibreConnectorClass()
    {
    }

    public string[] FibreConnList;
}

I'm trying to determine where the items come from, in the line:

foreach (string var in fibreconnect.FibreConnList)

I'm puzzled because the FibreConnectorClass tells me nothing.

Thank you for your attention.