I believe the K in the red circle would be a relay. I believe the port with the red and green circle would be the plug for the camera (at least based off of other Yuneec models I've seen torn open). Definitely call technical support before doing anything.
Thanks for the reply comandante.... the ports were definitely for the gimbal connection. have to trace things coz our gimbal doesn't work on the drone but works with steadygrip. We also figured out that the part with "K" value is a fuse 1.5A rated and it's busted since we can't get any supply on the red circle which should power the gimbal.