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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.
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 Create New Configuration in the New Config property row, and then enter the initialization parameters.