This guide appears to be missing all the required configuration steps on the Infoblox infrastructure to enable the acquisition of logs by an ArcSight Connector.
Has the rest of the guide been missed when it was republished.
Full information is provided in "Specifyiing Syslog Servers" in the "Using a Syslog Server" section of the Infoblox NIOS Administrator Guide. I will add the information that this is where to look to the SmartConnector configuration guide as well as an outline of the steps required. For detailed information though, we cannot replicate in our guide.