Their adapter should be threaded with a 1/4-20 nut on the bottom. This allows you to screw the adapter plate for your tripod head to the bino mount.
The general components you'd need are:
- A tripod. Some tripods are sold as a standalone. Others include some sort of head, either integrated, or separate. It should be very clear whether a tripod comes with or without a head.
- Tripod Head - This may be included with your tripod, but can be purchased separately. Most are interchangeable, so if you don't like one style, you can try another style. Ball heads tend to be cheaper and lighter, but they allow your optics to move in any direction and take some finesse to control. Pan Heads or Fluid Heads offer a much more smooth movement in fixed planes, but tend to be heaver and more expensive.
- Adapter plate for your tripod head - This is what screws to your bino mount, spotting scope, camera, to attach the item to your tripod. Your tripod head should include at least one with it. The Arca-Swiss style plate is pretty universal, so as long as the tripod head is arca-swiss compatible, most plates should work.