I use Stimtracker and STP100C
It’s little bit tricky to connect them.
(I’m failed to connect them using tiny board and DB37cable).
So, I connect Stimtracker with STP100C with DB25 cable from extra port(not DB37cable).
Than It’s possible to Marking EM3,5,7 from superlab (It’s enough in many case, you can use 7 different marking) and 1,3,5th button on response pad(in case of I/O cable connected).
Now, the problem is your 2nd button of Response pad cannot be marked.
I fixed this issue simply change the arrange of I/O cable connecting response pad and Stimtracker(actually, LAN cable, you can find anywhere).
When you change 2nd and 3rd line of I/O cable in one side, you can mark 1st and 2nd button independently on STP100C.