I like that....What end did you remove, do you have to get it pressed on or will it work without it
Look at your photo of the new part. You can see where it is crimped. Just squeeze it in the areas between the factory crimps and it will release the hold, well at least enough to get the ferrule fitting off without damaging the cable housing. Using a cutoff wheel, cut it to the desired lenght, and slip the fitting back on. The fitting does not need to be re-crimped (imo) because the pressure on the clutch cable will keep it all together when it's reassembled.
Make sure the coil spring (inside the housing) is cut at 90 degrees which is why I suggested the cutoff wheel. Don't just use a side cutter. You want a flush end when you done.
Have fun.