Each system and assembly has a list of attachments that connect it to other systems
        or assemblies. These are listed on the Attachments tab. You can modify an attachment by
        highlighting it in the Attachments list and using the entity collector to the right of the
        list. 
        
        - 
                From the Project Browser, select a system or
                    assembly.
                
The Systems/Assemblies panel is  displayed.
             
- 
                Select the Attachments tab.
            
 
- 
                Click Add.
                
The Add an Attachment dialog is
                    displayed.
             
- 
                Specify a label and variable name.
            
 
- 
                Select the attachment entity from the drop-down menu.
            
 
- 
                Select Single only or Pair or
                        single for Type.
                
                    Note: Certain entities cannot be modeled in pairs so these options may be
                        disabled.
                 
             
- Optional: 
                Enter any notes.
            
 
- 
                Click OK to close the window or
                        Apply to continue creating entities. 
                
The new attachment is added to the list.
             
- 
                Click the collector associated with the created entity and make your selection
                    in the modeling window, or double-click the collector to
                    display the Model Tree (from which the desired entity
                    can be selected).
            
 
        
            Tip: 
                
                    - To specify a tag for the attachment, click in the Attachment
                            Tag field and enter  a tag string.
 
                    - Delete an attachment by selecting it from the list and clicking
                            Delete.
 
                    - Modify an attachment's properties by selecting it from the list and clicking
                            Edit.