Turn the door frame ring up the right way so the keyhole bolt holes are at the top. Keyhole bolt holes are wide at the top and narrow at the bottom.
Push the ring in position around the drum and lift, raising the drum. Hook the panel's keyhole bolts onto the screws in the front of the appliance, and lower it.
Tighten the screws at the top of the ring to secure it in place. You can now begin replacing the remaining panels as necessary.