Select the artifact of the instance that you want to use. Select the folder, not the object.
Expand the Physical tree to the physical object that you want to associate with the artifact and select it. This physical object must be of the same type as the artifact.
Click the Create Associate icon to link the physical object to the artifact. If the Create Association icon is grayed out, the selected artifact and physical object are incompatible.
Repeat until all of the objects that you want to use on the logical view are associated.