It redirects there coz the hostname you've put as sapphiron.boxslots.com.
change the hostname?
If you want to know the current hostname, SSH this --> $ hostname
or there's an other way to access cpanel,
https://SERVERIP:2083/
still if it doesn't work, there's one more way :p
Login to WHM (
https://SERVERIP:2087/ ) > Account Information > List Accounts > choose the domain you wish to access Cpanel (Click on the Cpanel ICON)
sorry if my post makes you confused, I was just trying to help you mate :p
EDIT: AM I WRONG