"You mean the jackscrew is the elongated part that (visually) seems to connect the slanted piece protruding from he shredded VS trailing edge and the upper centre of the last frame ?
Yes, it was much clearer in the better (now gone) photo.
Very early in this thread there was an excellent photo of the jackscrew assembly and actuator. Compare this photo with that jackscrew actuator, and you can se that is what we are looking at.