How to modify the SharePoint Server database connection string

In the initial installation of SharePoint, everyone entered a database server address, where is this string of connection strings stored? Can I modify it?
The SharePoint server saves this connection string information in the registry. The path is as follows:

In some cases, if you need to modify the database server address or Identity authentication method, account, you can find the registry corresponding to the location of the changes.

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How to modify the SharePoint Server database connection string