Once you have the SHARE URL from the Google Drive, head to the Builders Portal page and edit with the UX Builder.
Highlight the column in the left panel and click the cog/settings.
Choose duplicate.
This will add a new column that you can drag into position.
Change the TITLE text in the left panel which appears under the ICON to the new Stage no.
Paste the URL into the Link
Remember to Apply and Update.