Pull one rubber grip off one side of the spring clamp using needle-nose pliers, exposing a hole near the end of the handle.
Cut a hole out of the handle grip where it aligns with the hole in the handle using a utility knife. Slip the grip back onto the handle.
Screw the wing nut into the inside of the handle so the thread comes out where you would grip the handle on the spring clamp.
Fasten a coupling nut to the wing nut. Attach your homemade reflector clamp to an umbrella bracket or tripod.
Adjust the clamp to the desired position. Clamp the reflector to your tripod or umbrella bracket using your homemade reflector clip.