Sorry for the delayed response. The code that is responsible for this part of OnDemand is not easily altered by our usual approach of using custom initializers. Version 1.7 will use an environment variable to toggle this feature. In the mean time if you are willing to edit the live code have a sudoer make the following change:
concat content_tag(:strong, t('dashboard.batch_connect_sessions_stats_host'))
concat " "
concat session.connect.host || t('dashboard.batch_connect_sessions_stats_undetermined_host')
end if session.running?