Hi @MichaelJo13,
Correct, the URL is captured automatically.
As long as you are still using the old AA setup to feed in data, I would suggest sticking with both for a little longer, since you may still have stakeholders in whose old world/dashboards, they may be used to using the eVar13. Unless they have already started recreating their dashboards in CJA with the URL instead, of course.
Cheers from Switzerland!