How to install a four-leaf hood on a standard reflector?

There are several installation forms of this light effect accessory.

I wonder what kind of lamps and accessories you have.

Better take a picture.

Some of them are equipped with two top screws and a crossbar. Loosen the top screw first, don't tighten it, then put the accessories on the standard reflective bowl, put the crossbar first, and then use the top screw to control the tightness. Just wait until the lower crossbar is slightly bent. Don't push too hard.

This kind of accessory is more common, and there are other accessories. I don't know which one you use. Let's talk about this common one first.