Removing and installing the expander clamp

1 plastic screws: Use a small screwdriver to remove the little plastic screw and remove the clip from the hole for the screw.
Expanding pin 2: Use a small screwdriver or nail a little out the pin (2) from the clip.

1. Plastic screw: Insert clip from the inside-plastic screw into the hole and tighten the screw.
2. Expanding the pin: Insert clip from the elongated pin in the hole and push pin.
3. Now clamp fixed.