Hi @taiwohazeez,
That is the cable that powers the VOXL. I'm suggesting you leave that plugged in and disconnect everything else. I see you still have the VOXL 2 WiFi Add-on board connected. Disconnect that as well all the cameras on the bottom of the VOXL, ESC, and GPS.
Please have the VOXL powered off while you disconnect everything.
Let me know how it goes,
Ted