- create a NODE
- goto configure NODE
- from inside the configuration page of the node select SSH node
- from inside the configuration page of the node select "Add Credentials"
- from the Credentials form view, select SSH-key type and "insert directly"
- try to insert a key
- it is impossible to scroll down to "save" or "cancel" the configuration
generate Credentials to be used from the Slave from the main "Credentials" section in the left panel of Jenkins