Im new to building the drone. Im building the f450 with naza-m v2, r12ds, and zen h3-3d gimbal. Im confusing with iosd mini and h3-3d gcu v2. Is it required to have iosd mini with h3-ed gimbal? I saw one of wiring diagram of h3-3d gcu v2 without iosd mini. I need help with wiring diagram.  thank you in advance..

Im new to building the drone. Im building the f450 with naza-m v2, r12ds, and zen h3-3d gimbal. Im confusing with iosd mini and h3-3d gcu v2. Is it required to have iosd mini with h3-ed gimbal? I saw one of wiring diagram of h3-3d gcu v2 without iosd mini. I need help with wiring diagram.  thank you in advance..