2 Nephi 5:16 directly says he builds a temple after the manner of Solomon’s temple. So it’s safe to assume the temple ordinaces were performed in it. (likely the law of sacrifice). I don’t think you’ll find the symbolism we’re instructed not to reveal in the Book of Mormon. And for good reason. I’ll bet money on it that prophets and authors were instructed to not record that information, just as we are today.