וְסֶ֙רַח֙ הָעֹדֵ֔ף בִּירִיעֹ֖ת הָאֹ֑הֶל חֲצִ֤י הַיְרִיעָה֙ הָעֹדֶ֔פֶת תִּסְרַ֕ח עַ֖ל אֲחֹרֵ֥י הַמִּשְׁכָּֽן׃
And as for the overhanging part that remaineth of the curtains of the tent, the half curtain that remaineth over shall hang over the back of the tabernacle.
Targum Jonathan on Exodus
And the surplus which remaineth of the curtains of the Tabernacle, the half curtain which remaineth, thou shalt spread over the hinder part of the Tabernacle.