You can select the package source from the following options:
Default Update Server:
This option allows you to use the default settings that are displayed on the console and the settings are not editable.
Custom Update Server:
This option allows you to customize the repository which fetches the package.
Local PAM Manager:
This option allows you to use local PAM Manager as the repository as Package source.
Enabling Agent Package Management option allows you to retrieve the packages from another instance of PAM manager.