Launch Aspire (if it's not already running). See:
Aspire Content Source Management Page
For this step please follow the step from the Configuration Tutorial of the connector of you choice, please refer to Connector list.
To add a Publisher to FS4SP, drag from the Publish to FS4SP rule from the Workflow Library and drop to the Workflow Tree where you want to add it. This will automatically open the Publish to FS4SP window for the configuration of the publisher.
In the Publish to FS4SP window, specify the connection information to publish to FAST Search for SharePoint content distributor service.
It will take a moment for Aspire to download all of the necessary components (Jar files) from the Maven repository and load them into Aspire. Once that's done, the publisher will appear in the Workflow Tree.
For details on using the Workflow section, please refer to the Workflow introduction.
Publish to FS4SP Configuration