BI client applications connect to your database and the Teradata BI Model Repository using Teradata OLAP Connector. Teradata OLAP Connector has useful administrative settings that are documented here. BI client application users typically do not have permission to change the Windows registry.
If the bitness of Teradata Schema Workbench matches the bitness of the Operating System, then the registry location root is defined at:
HKEY_LOCAL_MACHINE\SOFTWARE\Teradata\Client\15.10\Teradata OLAP Connector\RuntimeSettings
If a 32-bit Teradata OLAP Connector is installed on a 64-bit OS, then the registry location root is defined at:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Teradata\Client\15.10\Teradata OLAP Connector\RuntimeSettings