For z/OS:

Create the directories (mkdir) /etc/rmm and /var/rmm.

Execute these commands to copy various files:

cp /usr/lpp/dfsms/rmm/var/rmm.properties /var/rmm/rmm.properties
cp /usr/lpp/dfsms/rmm/var/rmmtocim.map /var/rmm/rmmtocim.map
cp /usr/lpp/dfsms/rmm/config/rmmlog.properties /etc/rmm/rmmlog.properties
cp /usr/lpp/dfsms/rmm/config/rmmcust.properties /etc/rmm/rmmcust.properties and make your necessary changes to the last files in the /etc/rmm directory.

The copies within /var/rmm and /etc/rmm are your working set of configuration files.