Can I use JON plugin wthout subscription on RHQ?

I setup RHQ (not JON) and found repository https://repository.jboss.org/nexus/content/repositories/ea/org/jbosson/plugins/fuse/servicemix4-plugin/
Can I setup and use plugin (example) servicemix4-plugin-7.5.1.redhat-630175.jar on RHQ?
Or only with subscription I can use this plugin?