Howdy Graham,
If you want to insert a widget listing your events then you should checkout the widgets within The Events Calendar. Events Calendar Pro Event includes a “mini calendar” widget that might work great in your third column.
If however you are trying to insert the full views from the calendar into this page, then you will want to checkout our Themer’s Guide. This will basically walk you through creating an inner template for the calendar, that will fit inside your page template. To assign your page template checkout WP-Admin > Events > Settings > Display, and then the Template selector dropdown.
If you need further help would you mind logging in so I can verify your support access? Or, if you don’t have/want a license (which includes a year of support) you should checkout the volunteer community on WordPress.org: The Events Calendar. It’s not the same level of support, but it’s free! We even check those forums once each week and help to the extent we can.
Cheers!
– Brook