You don't do any of that.
Simply download the Deepstack .exe file and run it and then check the box in BI that you are using Deepstack and then tell it which models to use within each individual camera in the AI setting in BI.
That command is only for those running a third party add-on, not the "integrated" solution with BI. But keep in mind BI is moving away from DS and going to Sense AI.