Property placeholder for ActiveMQ NFS v4 shared drive location

Issue

I am using NFS v4 for KahaDB Persistence Store for JBoss A-MQ 6.0 standalone broker running as Windows service.

I want to keep the location of remote shared drive outside of activemq.xml configuration as I don't want to hard code it inside <persistenceAdapter> node in activemq.xml file. I tried to define it using below property in org.fusesource.mq.fabric.server-default.cfg file but it does not work.

data=\\\\IT12318099\\nfs_4_shared\\amq

I believe this data variable is being used in standard configuration where this variable is set as data={KARAF_DATA}/amq and activemq.xml for Kaha DB directory is as directory="${data}/kahadb. Can we use similar way?