An attached part can represent any object you want to attach to another object. For example, it could be a manual attached to a connector.
If any parts were attached to an object in Library, the Attached parts dialog will be opened when placing this object in Studio.
You have attached two manuals to a connector, each in a different language. When placing the connector in Studio, the Attached parts dialog is opened, showing both manuals and letting you choose which one you would like to use. Of course, you can choose to include both or none.
In the Attached parts dialog, all the attached parts are check-marked by default. Thus, if you want to include all of them, just click [OK]. If you don't want to include a certain part, deactivate the corresponding check box and confirm with [OK].
Attached parts are not visible in the working window. They can only be seen in the tree view, next to the object to which they are attached.
Attached parts are assigned a wire harness if a wire harness is automatically assigned to their "parent" items during placement.