Changing Place for a Rosh Yeshiva in Mourning

A Rosh Yeshiva in the year of mourning for his father, does he need to change his place from the east? (In prayers where he is not leading, since there is another mourner in the yeshiva)

He should slightly change his place, but remain in the east out of respect for the Torah and the community.

Responsa Maharam Shik, Yoreh De'ah, Siman 369: "But in truth, what you wrote that you saw me standing with a slight change was in a place where many pass by, and it has no relation to the aforementioned discussion. And my reason was because I am uncertain if the rabbi in his city, where it is customary in all communities that the congregation gives him a special place at the head of the synagogue, and it is for the honor of the community, and the honor of the community in such a case, it seems to me that he is not obligated to change, as it is not appropriate to forgo the honor of the community. And although, nevertheless, he should not stand certainly in his place because the unlearned may learn from this and say that there is no need to change, and they do not know how to differentiate. Therefore, I made some compromise, and especially since I saw that the Gaon Berchi brought in the name of the holy Ari that on Shabbat he did not change his place. And although it was specifically permitted for a person like me, nevertheless, on Shabbat there is more leniency. And I also saw in the Shulchan Aruch, etc. This was my reason, and according to the law, as I wrote above. However, certainly, if it is customary specifically to change to a place closer to the entrance, then one should not change the custom, and each river flows in its own course."