How to connect Stim tracker to Acqknowledge

Dear Cedrus Support,

I have superlab 4.5 , response pad 834 and stim tracker. I connect Supperlab to Acqknownledge by using STP 100 C (Biopac). I don’t know how to set marker from stim tracker to Acqknowledge. Can you tell me the connection from stim tracker?

Where is Main USB of stim tracker will be connect?

Thankyou very much.