Copy the plug-ins to the munin plugin directory, e.g /etc/munin/plugins/.
To use these plug-ins you have to tell munin-node to execute them as root by changing the plug-in configuration file (on debian that is /etc/munin/plugin-conf.d):
[rabbitmq_connections] user root [rabbitmq_consumers] user root [rabbitmq_messages] user root [rabbitmq_messages_unacknowledged] user root [rabbitmq_messages_uncommitted] user root [rabbitmq_queue_memory] user root
You can set the name of virtual host by changing the plug-in configuration file (on debian that is /etc/munin/plugin-conf.d):
[rabbitmq_consumers] env.vhost vhostname [rabbitmq_messages] env.vhost vhostname [rabbitmq_messages_unacknowledged] env.vhost vhostname [rabbitmq_messages_uncommitted] env.vhost vhostname [rabbitmq_queue_memory] env.vhost vhostname