Connect Nodes (Link) 

The Connect Nodes (Link) command, accessed on the Diagram ribbon, opens a Connections window on the selected node to show any current links. From this window you can edit existing links or create new ones.

 

 

The variants of block diagrams (physical block diagrams and flow internal block diagrams) all represent connectivity between components. In the case of these diagrams, the lines connecting two nodes actually represent a physical interface. This differs from most diagrams where lines simply represent relationships. Therefore, the Connections dialog offers additional power when connecting a node.