I'm trying to install Snap Engage chat on my OC 3.0.2 store. Currently it's on a local host using XAMPP. Snap engage provide a code snippit which they say needs to be between the </body> on all pages. I've installed it on my old OC 1 store by editing the footer.tpl file. However this time I can't find a file with the same extension. I've found a footer.twig in catalog->view->theme->marketshop->template->common. Is this where I would go to put something in the body of all pages? I'm not sure because I added the code and nothing happened.