The meaning of the mu'adhdhin sitting between the adhan and the iqamah in the Maghrib prayer

Question:
Honorable Shaykh, may Allah grant you success. Ibn Qudamah mentioned in al-Mughni a hadith from the Prophet (peace and blessings be upon him) which states: "The mu'adhdhin sitting between the adhan and the iqamah in the Maghrib prayer is a sunnah (recommended practice)." He said: "Ishaq ibn Mansur said: I saw Ahmad go out for the Maghrib prayer, and when he reached the place of the row, the mu'adhdhin began the iqamah, so he sat down." May Allah preserve you, does this mean that he sits even if he has not performed the greeting of the mosque, or what?

Answer:
No, its meaning is that he sits for the time of the iqamah only. He sits for the iqamah while he is sitting; he sat for the sake of the iqamah. Yes. And if this is authenticated, its meaning is that he sits in order to listen to the iqamah and for it to be completed.