Ceiling – How to install a ceiling lamp that doesn’t have holes

ceilinglamp

I bought a floating lamp,

I started building everything, when I noted that the holder doesn't had any holes to fix it on the roof.

This are the "instructions":
Instructions

Here you can see my issue 🙁
Full view

This is a close up to the PLASTIC holder, only a small hole which is to keep a cable floating
Close up of the holder

This is a picture from the inside of the holder
Inside the holder

This is the hole of the cables:
cable holes

Best Answer

You take up the cable to the right length using the bracket in your last picture. Then you can pull the conical cover up. When I've used these, there's always been either (i) a little plastic screw in the hole you can see at the bottom of picture 3 or (ii) some form of friction clip built into the point of the cone.