Restrict server IP access and just use the panel.domain.tld instead?

<Location />
    Order deny,allow
    Deny from all
</Location>

I tried to follow the https://serverfault.com/questions/607137/restrict-direct-ip-access-to-website

however, I am just confused where to add the code above to TinyCP, so this will apply to all domains I have at the moment. By any chance, do someone knows about this setup?