Trouble installing Stream Isolation on Qubes 4.3

[Atrate]

How to setup the new qubes 4.3

first question in qubes 4.2 at sys-whonix → Tor User Config (Torrc) needed to add the “ConnectionPadding 1” text. In the qubes 4.3 i cant do the same. why? is that now not important? second question I wanted to make stream isolation in the 4.3 same as the 4.2 but it can’t possible. Why? How can i fix that in 4.3? third question where can i find a doc about the 4.3?

Please don’t post the same topic twice. Once someone knows the answer, you’ll hopefully get it posted there.