BaseExtensions can be used to add caption labels in Word. The specified caption label will be added to the cross-references in the active document. It is possible to add several caption labels at one time. Just use the command as many times as needed with different names of the captions to be added.
Module is located here:
<Cmd case="BaseExtensions:add-caption-label" name="x"/>
Define name of the new caption label that should be added to the cross-references.