How to override Mezzanine comments form?

I am using:

Python 2.7
Django 1.6.11
Mezzanine 3.1.10

Anyone who logs into my blog site can set the "name" field of the comments form for a blog post. I had the idea to hide this field but I can't find the template for the comment form.

Does anyone know where the comment form template is or another way to prevent users from setting the "name" field for comments?