Removed (Co-)pilot, but seatbelts animation is now wrong

Thanks for the idea, tried it, but did not work. Any other ideas? I did remove the pilots earlier by deleting the pilot section from the aircraf.cfg. But see the picture above, I cannot get the seatbelts to return to the normal resting position on the seat. So if you have any idea what controls those seatbelts, that also could be the solution.