These are all of the components required to assemble the fenders.
Place the flat threaded piece on the underside of the fender, facing up towards the holes in the fender. The flanged ends should be pointed upwards through the holes
Place the wire piece in between the holes
Place the captive piece over the top and hold it in place.
Use the screwdriver to screw in both of the screws.
Screw down until they are both flat against the holding clip.
Repeat the same steps for the other fender in your kit.