For converting the Server PSU I just bought into a DC power supply, not sure where to get the bananna plugs for it. I bought some normal ends to solder onto the end of wire leads, but I'd rather have them actually screwed into the case.
Something like this for use with the normal generic banana plugs almost all charge leads seem to use.
I hit up my local hobby shop "Al's Hobby shop" which usually has everything one ever needs for RC stuff, but they only had the female terminals I could solder onto a wire lead. Bought those anyways so I could convert this partly and start to use it.