Correct. If host, install directories, and other information changes you will need to modify those ars.ini files.
Just to reiterate. The name resolved by the -h parm in your proc should match the name specified in the @SRV@ line of the ars.ini on the mainframe. You have a lot of version names in your paths as well. Make sure you note which, if any, of those change when you upgrade and modify those paths accordingly in all your config files and JCL.