To add a multi-step straight connector, click on the originating node output link point (press and release mouse left button over the output link point). You will be in connector mode. Move your mouse, click the left mouse button again to add a connector point, and continue this step until you create all the required connector points. As a final step, click your mouse over the input link point of the destination node to create the relation. In connector mode, you can press the Esc key to exit the connector mode.