Do you have access to SAS Information Map Studio? If so, then you could open the application, click on the Insert Cube icon and select your cube from the available listing. Select the cube in the left pane and Insert All using the double arrow icon. Then you could save this map in the required location for your environment. When the map is built, you can search for this map in the IDP, create the default user view and save it. Then you can add this saved data exploration to your portlet.
If you can open the SAS OLAP Viewer (our environment has changed and I am unable to open it) then you can open the cube. This should generate a map, or you may be able to create a bookmark, that you could select to add to your portlet. I had used version 2.1 of the viewer back then so this may not be a feature of the latest version.