You can add custom graphics to your couplings so they are represented as a clamp. You can add these overlays in the catalog or right in the model. To add them in the model use the COMPONENTDWGBLOCKEDIT command. The dialog below shows the required fields to be filled out when assigning custom clamp graphics.
If you attach custom graphics for clamps you can determine how these will be shown in your CADWorx model by using the below setting found in the Setup dialog.
You can also choose to ignore any clashes that are created by the overlay.