The interchangeable soles of the Korkers wading boots have a nylon baseplate. This flexible plate has six locking pins that help in attaching the soles to the shoe base. All you have to do is:
Clip the front two pins within their slits under the toe region of the boots.
Now, secure the rear heel strap in place by hooking it in the screw behind the ankle cuff.
Lastly, snap the midsole pins in place by simply pressing them against the bottom of the boots.