Why was the Shulchan placed on the north side of the Heichal?
Targum Yonasan: Because it is the direction from which wealth comes 1 and from where rain drips on to the vegetation in order to sustains the people.
What did the twelve Lechem ha'Panim represent?
Targum Yonasan: They represent the Twelve Tribes.
Why was the Menorah placed on the south side of the Heichal?
Targum Yonasan: Because that is where the rays of the sun shine and illuminate, and that is where the storehouses of Chochmah are situated. 1
And what did the seven lamps represent?
Targum Yonasan: The seven lamps represented the seven planets which are compared to the Tzadikim on whose merit they illuminate the earth.