EEM 12.51 CR04 is 12.51.416
EEM 12.51 CR05 is 12.51.524
CR05 is fine to use with Process Automation 4.3 SP04, however I would recommend upgrading to the version provided with Process Automation currently, which is 12.6 CR01.
EEM 12.6 includes updates to OpenLDAP (from CALDAP) to provide full support for TLSv1.2