Hi @pcaltair
Name Server values (NS) are the addresses you add to your Domain Name to point it to the DNS hosting (DNS is not actually part of your domain name, rather a hosting service you add to it or host at with 3rd party).
A records (and other such records; TXT, CNAME, MX…) go in the DNS settings/hosting.
Looks like Hover offer DNS hosting, so once setup with them (if not already) you’d point your NS values to their DNS hosting service, as per this article:
https://help.hover.com/hc/en-us/articles/217282477--Changing-your-domain-nameservers
And then managing your DNS with Hover as per this article:
https://help.hover.com/hc/en-us/articles/217282457-Managing-DNS-records-