Opencart widget installation
1. Connect to the site files via FTP
It is necessary to go to the hosting, or connect to the source files of the site via FTP-client (eg. FileZilla) and make changes to the file "html.tpl.php", which is located in the directory:
Your_site/catalog/catalog/view/theme/the name of your template/template/common/footer.tpl.
2. edit the html.tpl.php file
Необходимо вставить код виджета перед тегом </body> и сохранить изменения. Готово!