Hello! I recently bought two YN622C II triggers to use with Rovelight RL600B. I am only using one trigger on top of my canon and another trigger/remote on top of that YN trigger which came with RL600B. Do I need another YN trigger and sync with cable to the rovelight? or does it communicate with inbuilt receiver in Rovelight? I am so confused how to use it. Also, I think it did not work when I set it up as the images were coming half over exposed. Please help!