Add field to template

I am developing a generic plugin for OJS 2.4.8 and I want to add some information to the Review page:


I want to add some information about the file after the “Supp. files” field

What is the best practice for this? Currently I am listening to the TemplateManager::include hook and then checking if the included template is the sectionEditor/submission/peerReview.tpl template and if so, replacing the template with my version in the plugin, which is a copy of the original one, except it has the extra field I want. Is there a better way to do this? It works, but looks like there is a better way.