First, you need to be sure your backing is squared and determine how the quilt will be loaded onto the machine. Stay tuned for instructions on how to treat a directional top, backing or pattern. Typically, we pin the zippers on the long edge to avoid rolling more than necessary.
For the sake of this tutorial, none are directional. Find the center of the edges you will pin to and mark with a pin.
Place your backing wrong side up on your table, with the edges to pin to on the top and bottom. Fold the top and bottom over so you can see the right side of the fabric.
Match the center of your backing to the center of your zippers, keeping your X’s that are on your zippers on the same side. Pin the center.
Pin your zippers. Don’t forget to remove your center pin. See photo for recommended bite and spacing.