I just replaced the the string on my Black Knight this week. I have not as of yet, put any speed nocks on the new string. But here is how I would do it.

You'll need 4 brass crimp on nock points and shrink tubing sized to the nock points. You could reuse the old speed nocks but I would just use new ones. Cut two sections of the shrink tube the same length as on the old string. Slide them on the new string before installing it. After you get your string set on the cams and remove from the press, crimp the new speed nocks in place and shrink the tubing over them.

I thought about using two of the rubber cushion buttons in place of the brass and shrink tubing to see if it has the same effect. If anyone has tried that I would like to know if it worked??