I looked up the Chasam Sofer with the piece that is boxed and could not find it.
Is there anyone who is well-versed in his writings that provide me with a link to his sefer?
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This is a piece from Chasam Sofer Al HaTorah published by Rav Yosef Stern, the Chasam Sofer's grandson's son-in-law, in 1961 (not to be confused with Toras Moshe, published by Rav Shimon Sofer, the Chasam Sofer's grandson, in 1879). Since it was published too recently, this is probably why it isn't available on Hebrewbooks.org, and probably why you couldn't find it.
However, it is available on Otzar HaChochmah. The first 150 pages on Otzar HaChochmah are free for viewing, so luckily for you it's accessible.