1996 Toyota Corolla positive battery clamp need help bad

Here's my problem I had to fix the positive battery clamp so I cut the one originally off totally because it was corroded and I could take it off with a wrench I even cut this brass piece that runs with the positive wire to the terimnal that is my problem what is it and what does it do I need to get that brass connection or if there is somthing out there that I can replace the positive wire and that brass connecter