One Identity on Demand - how to delete old DB connection strings


doing a version upgrade of OneIdentity, when we login into the various tools we have several connection strings saved, both the old ones now unused and the new ones.
We would like to delete the old now unused DB connection strings in the various tools.

Would you know how to perform this operation? Is there any procedure to follow or any tables where the strings are saved?

Version: 8.2

Thank you,