Log in to the control panel as admin.
Suppose we have two IPs:
Go to "WEB → Domains "
Create a default domain in your admin account, for example example example.com
Go to "DNS ". Create a domain name and specify the primary IP
Click Advanced Options and create two NS entries
Record : ns1 Type: A IP or Value: 188.8.131.52 (i.e. main server ip)
In the same way, we create a second NS
Record : ns2 IP or Value: 184.108.40.206 (your extra ip)
The domain registrar, write the following data for your domain: example.com
NS1 ns1.example.com IP 220.127.116.11 NS2 ns2.example.com IP 18.104.22.168
After this you can write in all domains
as in the panel and at the registrar.