Edit DuckDuckGo URL for Brave Private Searching

Is there a way to edit the URL that is called up for DuckDuckGo in private browsing?

Right now, it pulls up a “Moderate” Safe Search when using DDG. I want to change the default Brave URL for DuckDuckGo to use “OFF” as the default setting. DuckDuckGo has an article stating that a specific addition to the URL is required. I have the addition, but I can’t find out how to edit the default URL in the Brave Browser.

Thanks!