Use of an ellipsis

In a sentence containing a partial quote truncated before its natural ending, how is an ellipsis used and how is the sentence punctuated?

From a comment on Electrical Engineering:

@Olin: The OP clearly stated that: "Input A is ALWAYS on if input B is
ON"... It's just as clear that your circuit can't satisfy those
requirements, so how is my comment wrong? – EM Fields 50 mins ago

In that instance the ellipsis was used to indicate that the quoted text had been truncated, but since the ellipsis proper wasn't part of the quoted text it's unclear - to me - whether the ellipsis should have been included in or excluded from the quote, and how the sentence should have been punctuated.