I ran a global search for "href" on the conf folder and I didn't find any links pointing to either a login page or a registration one. I'm attaching the results so that you can see for yourself. My guess is that the link we seek is being defined in yet another .php file outside the conf folder.
I did find images being linked for the logo and so on, so that should help you to modify the look to some extent, see the attachment for references to such images.
PS: I did find this page in the documentation that is supposed to show how to make the login page your default page, just seeking for pointers on how b2e works, but it references to a couple of broken links Argg....