Screw Missing
In order to facilitate the user's installation, the factory usually pre-installs the required screws in the required parts, that is to say, user need to remove the screws and then re-install them when installing, which is also to minimize the confusion caused to the user during the installation.
Other parts Missing
Please first check all parts according to the manual, then take a photo of the parts you received, contact customer service via email, and inform them of the names of the missing parts.