Changing header and footer for freshdesk

I have a website [login to view URL], and I need to apply its header and footer to a third party portal called [login to view URL] (its third party portal from [login to view URL]) The code I have from Freshdesk which I can update is: {% if portal.current_page != 'csat_survey' %} <header class="banner"> <div class="banner-wrapper"> <div class="banner-title"> {{ portal | logo }} <!--h1 class="ellipsis heading">{{[login to view URL]|h}}</h1--> </div> <nav class="banner-nav"> {{ portal | welcome_navigation }} </nav> </div> </header> <nav class="page-tabs" > {% if [login to view URL] > 0 %} <a data-toggle-dom="#header-tabs" href="#" data-animated="true" class="mobile-icon-nav-menu show-in-mobile"></a> <div class="nav-link" id="header-tabs"> {% for tab in [login to view URL] %} {% if [login to view URL] %} <a href="{{[login to view URL]}}" class="{% if tab.tab_type == portal.current_tab %}active{% endif %}">{{ [login to view URL] }}</a> {% endif %} {% endfor %} </div> {% endif %} </nav> {% else %} <header class="banner"> <div class="banner-wrapper"> <div class="banner-title"> {{ portal | logo : true }} <!--h1 class="ellipsis heading">{{[login to view URL]|h}}</h1--> </div> </div> </header> {% endif %}