Hey Mathias,
I am not a practitioner of TSKSR, so I can't comment directly on your question. However, I do want to point out that the kata in the koryu that I am familiar with are not designed to teach particular techniques, but to ingrain certain postures and movements into unconscious muscle memory. This is why many of them don't make a lot of tactical sense (why would someone do that in that situation?). It is also why they tend to change in small ways over time as the hanshi decides to work more on particular movements.
So, perhaps there is a possible underlying movement or motion that is inherent in the movement done in those kata?
Just a thought.
Paul Smith
"Always keep the sharp side and the pointy end between you and your opponent"