in the Toolbox. We will now insert two Interface objects in place of the Source and the Drain. Interface objects define where the flow of materials enters/leaves the frame.
Left-click the Interface
in the Toolbox.
Insert the first Interface in the place of the deleted Source.
Insert the second Interface in the place of the deleted Drain.
Click the Connector in the Toolbox.
Connect the first Interface to the Buffer.
Connect Testing to the second Interface.
Close the Frame.
