Before you start: Mount the wire shelf or the wire shelf basket where you intend to hang the shelf hook.
The shelf hook can be attached using either the double wire at the front/back or the middle support wires.
When installing the hook on the front of the shelf: simply choose where on the shelf the hook should be mounted and then firmly pull down the hook into position.
When installing the hook further back on the shelf: aim for one of the middle support wires (or the double wire at the back). Then thread the hook in from underneath, with one of the front-to-back wires coming into the middle opening at the top of the hook. And then firmly pull down the hook into position.