How to edit registration email?

Hello There.

I’ve got another problem. It’s all about registration email. I’ve changed the registration page and need to correct the registration email.
Typically u’ve get this link in email after the registration:
https://yourdomainname.com/wp-login.php?regplus_verification=7f4gkh46l5bd8meh1e2a43cjh6

i need to change this:
wp-login.php

to this:
wp-login2.php

And i don’t know where i can find it in wordpress files.
I tried to use register plus with changing email body but there is just %siteurl% which enter the whole link.
Do u know where i can edit this thing, exactly in which file it’s placed?