Delete the connector between the Source and the Line.
Insert the object Assembly from the tab Material Flow in the Toolbox before the line and rename it to LoadStation.
First, connect the ContainerSource to the LoadStation, then connect the Source to the LoadStation and the LoadStation to the Line.
Double-click the LoadStation and select the Assembly mode Attach MUs. On the tab Times in the same dialog, enter a Processing time of "0:50".
