Links to additional files or web-pages for Self Service web application can be configured by the administrator in Indeed CM Setup Wizard. They will be displayed on: https://<FQDN Indeed CM server>/icmservice/Downloads. The same page also can be reached by clicking <иконка загрузки> button on Self Service page. 
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Enable downloads option in Common features section of Indeed CM Setup Wizard.
Click on the link to start file download or go to the web-page.