If I remember correctly, the Tekki katas are called Naihanchi in the Okinawan martial arts. If so, there are alot of groundfighting applications in them. Whether they were deliberately put there origanally, I can't say, but there are only so many logical ways for the human body to move.
Try working some of the moves from the guard or when mounted also. The sidesteps in the kata can be interpreted as various turnover moves.
Have fun!
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