Linking WebiReport with Dashboard using Relative WebService URL

Hi Experts,

I am trying to build a Dashboard based on Webi Report Latest Instance. I could do this using Web Service URL with Absolute Server Name and Port Number.

But I am looking for Relative Web service URL( without Server Name and Port number in the web service URL) to migrate the Dashboard across the Environments.

SAP Dashboards 4.1 SP2

Teradata 15,

SAP BO version 4.1 SP5

Thanks in Advance.