Canada post input boxes not available for package_width” “package_height” “package_length” when entering a product in back end( I think package_ready_to_ship is also needed?)

I know they are in the database and also reside on collect_info.php ( admin/includes/modules/product/collect_info.php).

Do I need to physically create an attribute with the same names or is this already done in the module and I just need to "turn it on" somehow?

Thanks
Bman