If you don't change the OPSBCPII JCL procedure you won't be enabling V2. From documentation:
Used to enable the OPS/REXX ADDRESS HWS v2 host environment. You specify EXECPARM=RESTAPI to enable the HWS v2 host environment that uses the z/OS BCPii V2 HWIREST RESTlike API.
DEFAULT = NORESTAPI
Note: Specifying EXECPARM=RESTAPI will initialize both the legacy z/OS BCPii V1 interface as well as the BCPii V2 REST interface. Which interface processes requests is controlled by the APIVERSION keyword that you specify on the ADDRESS HWS SENDCMD, SETATTR or GETATTR commands.
So, if you don't specify EXECPARM=RESTAPI, only the v1 option will be enabled. Moreover, if your ADDRESS HWS commands don't have the APIVERSION(2) keyword you would still be using v1.
Install and configure hardware services