Add a social invitations button

Hello,

I have found this plugin which seems great to invite our friends on Facebook for our project. But i would like to put it under the project sponsor. But i dont know where to put it. I did not find the project template.

The plugin is : https://wordpress.org/plugins/wp-social-invitations/installation/
And the code to insert is : WP_Social_Invitations::widget(‘Some title’);

Thanks for your help.
Maxime