John Gill Commentary Exodus 27:15

"And for the other side shall be hangings of fifteen cubits; their pillars three, and their sockets three." — Exodus 27:15 (ASV)

And on the other side [shall be] hangings fifteen cubits ,
&c.] On the other side of the gate, or entrance into the court, on the northeast side, as the other may be supposed to be the southeast side, there was the same length of hangings:

their pillars three, and their sockets three ;
the same as on the other side of the gate.