The USERMOD sample for the System Parameter Block for CLIv2 (HSHSPB) is TDU0007 in dbcpfx.SAMPLIB.
HSHSPB is used and modified in the same way HSISPB is used and modified, except HSISPB contains TDP and CLIv1 parameters, while HSHSPB contains CLIv2 parameters.
For information on HSHSPB parameters and possible values, see IBM CICS Interface for Teradata® Reference, B035-2448.