If you can register the computer directly, you will get a button that says “Register this computer”. Click on it, and everything is ready after that 🙌 (locked IP must be selected under “type of time registration”):

If the registration is to be sent to the administrator for approval first, the button will say “Suggest registering this computer”. Click on it, and it will be sent to the administrator for approval.

As you can see to the right, it shows both the date and time a registration was last sent, and if it has been approved (confirmed) or not yet.

The approval is sent to the administrator. When it is approved, it will work to check in. 🙌