Baseline required for task-based functional connectivity analysis?

Hello,

I have performed a task-based functional connectivity. For this purpose, I largely followed the manual and the forum. In retrospect, I noticed that I have specified epochs for conditions that I was interested in but no baseline. While I understand that this is not necessary for resting-state functional connectivity, I imagine that it is for task-based connectivity.

Could you please advise me how to go about this? 

Thank you very much,
Leonie