Possible to set URL for widget via API?

Hello - when I run getWidgetsForUser in v.20 of the SOAP API, a list of documents is returned, but none of them have url values:

{#810

             +"documentKey": "[key]",

             +"reusableDocumentStatus": "ENABLED",

             +"javascript": "[js]",

             +"modifiedDate": "[timestamp]",

             +"name": "[name]",

             +"url": null,

           },

I need the url to pass to createPersonalUrlWidget, but don't see it in the return. Is there a way to set it? If I open up the returned js in a browser, I can see the actual url for the widget in the javascript embed (but would rather be able to call it directly).

Thx