I been trying to put the fun together but I believe this fan is missing a part that conects the light part to the fan part... do you have a manual of this fan or pictures. Or maybe that part..?

Did you purchase the fan here in the domestic U.S.A. If so, where and what is the name of the U.S. company?

There are hundreds of fan models that are sold by U.S. companies but are sourced out of China.

Model means nothing. Post a picture and maybe we can help.

Couldn't find manual, found it could be Harbor Breeze or Hampton Bay.
The Piece you are looking for may be on the other part of the light. Many time they mount with 3 screws, 2 can be installed, then push those 2 screws through the slotted keyholes, and turn, the 3rd screw makes sure it doesn't undo.

Install Blades before Lightkit.