How to run a silent install of Kingsoft Office?
You will need to download the full package from the official website. Once you have the package, open a command prompt and type wps_office_10_122 /S. You will need to append /S to the command line and the software will install without user interaction.
Download package: http://www.kingsoftstore.com/kingsoft-office-freeware.html
Use the image as guidance: