Also, tie cotton string around it (between the white and red wires, for example, and around the back of the receiver) to keep it from becoming unplugged again once you find the combination that works. You can also put a tiny dollop of your girlfriend’s nail polish directly on the knot in the string to keep it from untying under vibration.
Also that yellow XT60 there needs a cable tie around it, or it too will eventually vibrate loose and cause the board to turn off in the middle of a ride.
Putting shrink wrap around those bullet connectors helps as well.
Look through this thread and proactively do as much as possible to avoid these problems.
Stuffing foam into all the air-filled space is a good idea also.