The corridor way  as was built separates the entrance between the backyard and front facade of the Mosque. As referred the word jamatkhana means “the house of the community” and is  an amalgamation of the Arabic word jama‘a, which means group  or community, and the Persian  word khana, meaning even other community can use the cooridorway for other purposes not necessary for the only the shia's .
<a href="//commons.wikimedia.org/wiki/User:Erasmus_Kamugisha" title="User:Erasmus Kamugisha">Erasmus Kamugisha</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>