There is no way to customise this page in a supported way. If you want additional information, you should raise an idea with Tableau here (Ideas ).
However, I think the Connects To probably already gives you want you need... Remember the data source in Tableau could be from a variety of sources : Excel Files, SQL Server database, etc etc. The Connects To column tries to provide you with the info associated to the connection, which depending how its set up could be the server name, an IP address, the name of an Excel file etc...
Thank you for your reply. Your suggestion works fine.
Great to hear. Please mark my response as correct to close the thread down.