Hey, looking for some help here

I am playing Piazzolla's "history of the tango" for my end of year exam, but both my teacher am I are stumped for 1960's nightclub. If anyone has played it, it's before the first 6/8 time change, and marked with a percussive notehead with "T K" marked under the rhythms. This was transcribed from..I think flute? The idea of saying "T K" works with flute but not so much with sax... Slap tonguing doesn't fit - does anyone have any suggestions?

Thanks in advance :D