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If you are using Developer Studio, you can import a connector into your ESB config project by right-clicking the project, choosing Import Connector, and then navigating to the connector's ZIP file (for a list of predefined ESB connectors you can download, see ESB Connectors). The operations in the connector are then displayed in the graphical ESB editor, allowing you to drag them to your proxy service, sequence, or other configuration.
For details on using the operations in these default connectors, see ESB Connectors
Notice that the first operation in the workflow is init, which initializes and establishes the connection to the service (in this example, it contains the authentication information for connecting to Google Spreadsheets). This connection is used by all subsequent operations in the flow unless you specify a different init configuration for a specific operation. To specify an init that has been saved as a local entry, enter its name in the Config Ref property. To create a new init for this operation, click the New Config property row, click the browse button that appears, and then enter the initialization parameters.
For more information on using connectors in Developer Studio, see Working with Connectors in the Developer Studio documentation.