def simtelTelescopeConfigFileName(
    site, telescopeModelName, modelVersion, label, extraLabel
):
    """
    sim_telarray config file name for a telescope.

    Parameters
    ----------
    site: str
        South or North.
    telescopeModelName: str
        LST-1, MST-FlashCam, ...
    modelVersion: str
        Version of the model.
    label: str
        Instance label.
    extraLabel: str
        Extra label in case of multiple telescope config files.

    Returns
    -------
    str
        File name.
    """
    name = "CTA-{}-{}-{}".format(site, telescopeModelName, modelVersion)
    name += "_{}".format(label) if label is not None else ""
    name += "_{}".format(extraLabel) if extraLabel is not None else ""
    name += ".cfg"
    return name