In cars plastic wheel arches, as, indeed, many other non-metal parts attached to the body with screws as”screws”. After a few vyvorachivayu-svorachivanie fasteners (or vibration in the process of operation) the hole is developed and the connection weakens. When tightening the “screw” is rotated.
In this case, the first hole is necessary to insert the hook from the soft steel wire (paper clip), and then tighten the screw. Then trim the wire with wire cutters, leaving and turning down the small end of the outside: get so from the hook bracket that will not fly and subsequent loosening of the fastener.