To setup private nameservers for your reseller account follow the below 2 steps.
- Login to your cpanel and click on DNS zone.
Here you need to pass A Record with your nameservers. eg.. ns1.brownhosting.com and ip address. You will get your ip in your welcome email.
Repeat this step for NS2 (2ed nameserver)
2. go to your domain provider and pass child ns records (Private ns) with same ip and nameservers as above for both records.
That's all, if you are able to access your nameserver in browser then its means its working.
Rise a ticket if you still need help.