ומתחתה לשכות [וּמִתַּ֖חַת] [הַלְּשָׁכ֣וֹת] הָאֵ֑לֶּה המבוא [הַמֵּבִיא֙] מֵֽהַקָּדִ֔ים בְּבֹא֣וֹ לָהֵ֔נָּה מֵֽהֶחָצֵ֖ר הַחִצֹנָֽה׃
און אונטער די דאָזיקע קאַמערן איז געװען דער אײַנגאַנג פֿון מזרח, אַז מע איז געקומען צו זײ פֿון דעם אױסנװײניקסטן הױף.
Rashi
And below these chambers I do not know whether this comes to teach that they had tunnels beneath them, or whether it comes to teach that there were chambers in the east of the Court, and [that] since the mountain slopes [downward] to the east, he calls it “and below these chambers.” And he is saying this: And at the lowest point of the Court, to the approach that was on the east as one comes to them from the outer Court.