Yes, those two part numbers fit the square end cables. Unfortunately I took the parts out of the bag before seeing which number refers to the black end. Sorry. I will say that putting the white one on should be easier than the black one so you might as well do both! Definitely improved the feel IMO.
Technically, the guy did go through the Focus schematics for the MTX 75 to get to the part and as I've only ordered these ~1 week ago surely they are still available.
Ordering new cables at 10x the cost of the ends was the first option thrown my way too, how odd....
