Insert the pin through the hole and into the tube as in the picture. Guide the hair pin through the strap to the other end. Trim the end where you cut the hole. Remove seam allowance from the top edges of the front and the back piece of the camisole. Pin shoulder straps to their places on the back piece.
Machine baste the strip to the right side of the of the garment right sides together.
Match raw edges. Sew through shoulder straps on back. Start at one front corner and stop at the other front corner. Leave some extra length at the beginning and the end of the binding. Fold binding over the edge to the wrong side of the garment.