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にございます

is; it is

→ に
phrase Rare #42,188
is; it is A highly formal, old-fashioned, or theatrical form of です／でございます. It is often used in polite servant or ceremonial speech, and can also mean “is located” when referring to a place or object.
JA: その答えはこちらにございます。
EN: The answer is here.

もちろんにございます

Of course.

— かぐや姫の物語 (2013)