Here's how it works - The S5 Tab Show uses 20 modules positions: s5_tab1, s5_tab2, s5_tab3, etc. Simply publish your module to any one of these module positions (you may publish to the same position more than once for multiple modules in one tab). In the module manager assign what page you want that module to show on. If the module is set to show on a certain page it's tab will also show on that page.