To register new servers you need to create a KernelCare key used for the registration.
Click Add button, so a new registration key will be automatically generated and shown in the list below.
The key itself will be used as part of the registration command on individual server. You can provide a description for the key, as well as max servers that can be registered under that key.
Removing the key would remove all servers under the key.
Clicking on the key would let you see the information about servers registered under that key, as well as remove servers.