Parking brake setup w/different rear end

[Asshat]

I have an 83 rear end in my 63 C20, and am looking for the brake cable parts and how to install. I previously had a propeller shaft brake.

I have the brake handle that mounts under the steering coulumn, and the rear end seems to have all the parts for attaching the cable. However, I am missing the triangular shaped piece, which I believe is mounted to the cable; are there more parts required?.

Is it a two-piece cable system? One cable attaches to the rear drum and the other cable connects to the brake lever? Or, is it a three-piece system?

I found these on RockAuto.