I just purchased a Q500 4K today. I charged it up, took it out and I was like a kid at Christmas. Everything worked perfectly and exceed my expectations. I regret waiting so long As I was going through the case contents looking at all the cables and connectors figuring out what everything is and where it goes. I was wondering what the 4 pin connector on the Steadygrip behind the gimble mount is for. It doesn't appear that I have a cable for it. There is also one on the underside of the Q500 behind the gimble mount. Everything appears to work fine without a cable being attached.