Quoting_commentary for Exodus 40:26

וַיָּ֛שֶׂם אֶת־מִזְבַּ֥ח הַזָּהָ֖ב בְּאֹ֣הֶל מוֹעֵ֑ד לִפְנֵ֖י הַפָּרֹֽכֶת׃

And he put the golden altar in the tent of meeting before the veil;