Service Configuration is where you configure and select settings for WorldCat Discovery, circulation policies, and ILL integration.
Service Configuration is not in the WorldShare Service Management, but you can use the same username and password to sign in to Service Configuration.
OCLC Support has a helpful FAQ guide on how to add and configure shelving locations in both the Holding Codes Translation Table and the Loan Policy Map in Service Configuration:
How to Add or Remove a Shelving Location in WMS