Hello,
I need to manually add a in the head html, but i can’t find it, where is the file i can do that ? 
Hi There,
Thank you for writing in, while that is outside the scope of support, I could point you in the right direction with the understanding that it would ultimately be your responsibility to take it from here.
You can add it on _meta.php file under x/framework/views/global/ directory. Copy that file on your child theme, same path and do your modifications there.
Cheers!
Thank you !
You’re welcome.