TK Greenwebspace.com

Hello, I used to display some custom content in the clientareaproductdetails.tpl using an include statement like: include file="$template/customcontent.tpl" Since the upgrade to WHMCS 8.1 this template uses the variable $tplOverviewTabOutput to display content: {if $tplOverviewTabOutput} {$tplOverviewTabOutput} {else} How can I add custom content to this variable or what would be the best approach to solve my problem? Thanks!