In RFEM 6, the order of components plays an important role when editing connections, as it "runs" from top to bottom.
For example, if you want to edit a plate, you have to define the plate in the list of components first, as well as the Plate Editor component below. The same principle applies to other components, such as "Plate Cut".
The video shows you in detail how to proceed when modeling the connection without using the component library.