Need to change Twitter card setting from "summary" to "summary_large_image"

I have Twitter Cards enabled in the Social Integration settings of Easyblog....but there isn't a place to enable the "summary_large_image" for the autoposting for twitter. I tried editing the index.php file of the template and adding the <meta name="twitter:card" content="summary_large_image"> meta code....but there is a setting in Easyblog that is overriding this. I looked in components>com_easyblog>helpers and could not find a twitter.php file to edit.
(FYI...my site is whitelisted now with twitter to allow for "summary_large_image" cards).

Where can I find that twitter.php file to edit in the latest version of Easyblog?

Or do you have any other suggestions in getting this to work?....