Host (-HOST)
Use the Host adapter command (-HOST or -H) to specify the name of the system or localhost to which you want to connect.
This is a required command unless you are running on a native CICS platform. Do not use the -HOST command if you are using the CICS adapter within a CICS region.
-HOST host_name
For example:
-HOST Your.CICS.system
Where host_name is the name of the z/OS® system that hosts the CICS to which you want to connect.