Midrasch zu Schemot 40:7

14) (Vayikra 1:5): "at the entrance of the tent of meeting" — and not when it has been dismantled or when the wind has furled the curtain. R. Yossi Haglili says: What is the intent of "at the entrance of the tent of meeting"? Because it is written (Shemoth 40:7): "And you shall place the laver (hakiyor) between the tent of meeting and the altar," I might think (directly) between the tent of meeting and the altar; it is, therefore, written "the altar roundabout, which is at the entrance of the tent of meeting" — the altar is at the entrance of the tent of meeting, and not the laver. Where, then, was the laver placed? Between the ulam (the hall leading to the interior of the sanctuary) and the altar, somewhat removed (from the corner of the altar) towards the south (so that the laver was indirectly between the tent of meeting and the altar.)