You are to make two frames for the corners of the tabernacle on the back.
He built a wall 30 feet in from the rear of the temple as a partition for an inner sanctuary that would be the most holy place. He paneled the wall with cedar planks from the floor to the rafters.
And for the back of the tabernacle on the west you will make six frames.
At the two corners they must be doubled at the lower end and finished together at the top in one ring. So it will be for both.