For those who had the same question, I just found one adaptor that seems to be compatible:
j-link 9-pin
Hi everyone,
I bought the ST-LinkV2, but the cables that come with the programmer are not suitable to connect to the MTMDK-XDOT JP1 (JTAG).
The devkit manual recommends the Samtec FFSD-05-D-06.00-01-N ribbon cable, but this cable has 10pins which are not compatible to the header size of ST-LinkV2.
Is there any adaptor that you are using for that or did I miss something?