I have the Sram instructions. Do I need to buy a new Barb thing or can I reuse the old fitting?

I'm pulling the cable off the rear shock, cutting the cable several inches, but then what?

Can I unscrew or pull the silver thing from the remaining cable I just cut and put it back on the new end?

I looked on eBay and found a silver piece, but it only mentions Reverb posts.

I found a complete cable for Full Loc remote replacement, but it's $23. The silver barb looking things look to be around $8.

Anyone know?