MyBB Community Forums

I want to add seo tags and other code to the header. Where would I edit MyBB to do that?

Specifically, I want to add:

nofollow,noindex tag
Twitter Cards tags
Facebook Open Graph tags
Google Analytics tag

I need to add the tags to the MyBB forum header.

Ungrouped Templates --> headerinclude is the template pumped out at the beginning of each page.

Thank you.