Looking again, maybe its the TOSLINK board MC pin header connector you need, not MK. You can trace them or ring them out to figure out which one it should be.
Allright Mark, I will take into account, thanks, I am flirting the idea of an adapter board, preperforated glassfiber & two sided solder pads, to allow 2 female 2x10 header. Not only neat, but very handy for different wiring tryouts.