I was in the process of replacing my shift cable outer sheath when it got stuck on the nylon insert. I didn’t know it was an insert until I read up on it more after I had tugged and pulled and pulled on the cable until I couldn’t do it anymore. I finally was able to pull the cable through, force fully. Anyways to my point. I am trying to put the new cable in, but it won’t fit due to the brass on the end. Is there something I can do to get it through? I cannot get to the insert from up top. And if I drill it out, do I even need it?