Corsair LED strips are 3 pin connectors unlike the fans which are 4 pin. You simply have to plug in one Corsair RGB LED strip directly into a free lighting Channel on your Commander Pro (#2 in your case) and then connect the next strip to the first strip and so on. You can daisy-chain up to 6 Strips together per channel this way (or up to 5 strips and a Dominator Airflow Platinum RGB Fan at the end of the chain). https://www.corsair.com/us/en/Categories/Products/Accessories-%7C-Parts/iCUE-CONTROLLERS/CORSAIR-RGB-LED-Lighting-PRO-Expansion-Kit/p/CL-8930002#tab-tech-specs
