These connections retrieve data from the source system. Their job is to query or crawl remote systems for files, folders, metadata, versions, and renditions. They also add source-specific configuration to job in the form of Specification Tabs. Integrate your Alfresco or FileNet servers for example for better document management.
As a general rule, Connectors do not delete documents. It only copies and writes them.
Most Integration Connections can act in both repository (read) and output (write) modes. If it can’t, it will not appear as an option when creating or editing a job.