Exodus 30:6

לפני הכפרת BEFORE THE PARTITION VEIL — But this vail was drawn across the entire width of the Tabernacle, and you may perhaps say that the altar was not to be placed exactly before (exactly in a straight line with) the Ark but might be withdrawn from the straight line to the North or to the south since in that position, too, it would be before the partition vail; therefore it states further, “before the covering of the Ark”, i. e. exactly in front of the Ark but outside the veil.

And thou shalt put it before the veil that is by the ark of the Testimony, before the covering that is over the Testimony, where I will meet with thee.

וְנָתַתָּ֤ה אֹתוֹ֙ לִפְנֵ֣י הַפָּרֹ֔כֶת אֲשֶׁ֖ר עַל־אֲרֹ֣ן הָעֵדֻ֑ת לִפְנֵ֣י הַכַּפֹּ֗רֶת אֲשֶׁר֙ עַל־הָ֣עֵדֻ֔ת אֲשֶׁ֛ר אִוָּעֵ֥ד לְךָ֖ שָֽׁמָּה׃