To Link Two Existing Connectors

Right-click on an existing connector in the active drawing.
Select Connecting to Existing from the context-menu.
The Connectors Options dialog displays.
Enable the Document Filter and select drawing from the drop down list.
Click the Search button. A list of available connectors displays.
Note: Only connectors that match up to the existing one in the active drawing displays. (For example: if you are trying to link an On page connector, then only the Off Page existing connectors will display in the Available Connectors window.
Select the connector to link to.
Click OK. The link between the connectors is made. The annotation for the connectors will be updated to displays their directional status (ON/Off.)
Note: If the connector is connected to an pipeline in the drawing, then the pipeline's Tag, Run, Size annotation is added to the Connector Direction annotation as well as the target drawing.