וְנָתַתָּ֤ה אֹתוֹ֙ לִפְנֵ֣י הַפָּרֹ֔כֶת אֲשֶׁ֖ר עַל־אֲרֹ֣ן הָעֵדֻ֑ת לִפְנֵ֣י הַכַּפֹּ֗רֶת אֲשֶׁר֙ עַל־הָ֣עֵדֻ֔ת אֲשֶׁ֛ר אִוָּעֵ֥ד לְךָ֖ שָֽׁמָּה׃
And thou shalt put it before the veil that is by the ark of the testimony, before the ark-cover that is over the testimony, where I will meet with thee.
Read kabbalistic (mystical) interpretation of Exodus 30:6: and classical mystical sources.