Clarify _admin/cluster/health reference

Author: Simran-B

docs/Manual/Deployment/Kubernetes/Drain.md

@@ -310,10 +310,10 @@ POST /_admin/cluster/cleanOutServer
 {"server":"DBServer0006"}
 ```
 
-(please compare the above output of the `/_admin/cluster/health` API).
 The value of the `"server"` attribute should be the name of the DBserver
 which is the one in the pod which resides on the node that shall be
-drained next. This uses the UI short name, alternatively one can use the
+drained next. This uses the UI short name (`ShortName` in the
+`/_admin/cluster/health` API), alternatively one can use the
 internal name, which corresponds to the pod name. In our example, the
 pod name is: