I said to remove the old connector, but I didn’t say to cut it off. Pry the halves apart (use fine cutters to snip the retaining clips first) and pull the cable off of the contacts. Inspect for damage (especially shorts), and then crimp the new connector onto the cable maybe 1/4” down the cable so it’s not biting into the old holes. Worst case scenario you still have to replace the whole cable. Best case, you’ve saved yourself a bunch of desoldering.