The clips are attached to the existing THREE small brass screws on the rim of the bucket, the clip 'tounges' face out and the chrome headlamp rim goes outside the clips, and the clips fit inside the mesh rim, the fitting can be a bit fiddley positioning the mesh to conform with the clips and the angle of the mesh.
If possible try to fold over and entrap the mesh rim on at least one fixing (preferably the bottom one) so it cannot fly off.
I have had a couple of sets of these and found they can rust even if they claim to be stainless, so especially on the chrome ones I would spray the insides of the mesh with smooth silver hanmmerite, you cant see it and makes a lot of difference.
