In order to point your domain name to our servers you will need to visit your domain registrar (the website where you registered the domain) and set the nameservers there.
This is a common process at all domain registrars and the function should be located in sections like 'DNS Management', 'Change Nameservers'. For specific help on changing the name servers at your domain registrar, feel free to navigate to their website's help section. Search for 'changing name servers' or 'changing DNS servers'.
After you have updated the nameservers on your domain, it will take some time to propagate. Usually it starts working in 24 - 48 hours.