RKS1 was the same way. With RKS1, the runner just hit "Pause", then chose "End & Save Replay" to stop the replay recording after landing the final hit on Dracula Graf Sepperin, before passwording over to Iris Castle. So, to be consistent with RKS1, you would Pause -> End & Save Replay after landing the final hit on whichever Schwarzkreuz you kill last.
"Pause" should not be confused with "Start" which pulls up the weapon menu. If you don't know what Pause is bound to, check your key config in the options, but by default it's Spacebar.
"Pause" should not be confused with "Start" which pulls up the weapon menu. If you don't know what Pause is bound to, check your key config in the options, but by default it's Spacebar.