Commentaire sur Chroniques 2 4:7

And he made the ten golden candelabra according to their regulations Why is it stated in connection with the candelabra, “according to their regulations”? Because he informs us why he made ten candelabra, and everything he deduced from the Torah: the flowers, the knobs, the almond-shaped cups enumerated in the chapter were seventy, meaning that for each of the ten candelabra were seven lamps. (This is how my mother’s brother, my uncle, Rabbi Klonimos the son of Rabbi Judah explained it, and it is a midrash), and its seven lamps corresponded to the seven planets: Sun, Venus, Mercury, Moon, Saturn, Jupiter, and Mars.

and placed them in the Heichal, five from the right of Moses’ candelabrum.

and five from the left but they were all in the south.