Arriving at the Loner base in Cordon, I heard gunfire from inside the building. Turned out to be the prison guard shooting poor Khaletskiy again and again.
Since the guide didn't take me anywhere, I had to go through Dark Valley to get south of the railroad bridge. Khaletskiy's driver was not in the tunnel, Sidorovich was not open for business and Wolf didn't speak to me.
---QUOTATION--- After that I could do a quest for the CS squad leader (capture point from mutants), but alas the squad never followed me there. ---END QUOTATION---
After arriving in Garbage (through Red Forest/Limansk) I suddenly got a message that CS had captured the point. I could also see CS squads on the move in the Swamps, but after a while they seemed to be pushed back.
The "teleport cluster" is right behind the South farm (quite a detour to get there from the twilight xone entry point ).
I first tried climbing the tree growing across the fence, but while I did manage to land on the other side of the fence I still got stuck in a pocket between the fence and the invisible barrier.
Edit: that was at the fishing hamlet.