Cluster nodes are virtual machines. After assigning a floating IP to the node, you will be able to connect to it via SSH using the command:
ssh core@[floating IP] -i "[path to the private SSH key on your computer]"
How to assign a floating IP:
In the "Pools" tab, expand the pool menu. You will see a list of the nodes included in it. Remember the name of the node you want to connect to and click “Add IP”.
Create a new floating IP assigned to your node — to do this, select the node in the "Select Instance" field.
Or assign the previously purchased floating IP to your node using the "Assign to Instance" button.
The floating IP will be assigned to the node. You can detach this IP later if you wish.