Hi Krishna
On the portal, choose System Administration ® System Configuration ® Universal Worklist and Workflow ® Universal Worklist Administration.
1. The Universal Worklist Systems list appears. Here you can define connectors and systems as item providers for the Universal Worklist.
2. To add a new entry, choose New. To edit existing information, select (highlight) the row and choose Edit.
3. To save the current system registration, choose Ok.
4. Multiple system connections are defined by repeating the above steps 1 to 3.
Check this document:
Also Please check the following notes:
1133821 - UWL Destination Service configuration
1939438 - "User is missing credentials..." error while registering a connector within UWL
Thanks
Regards