Normally, you need the complete document admitted as evidence, even though you are mostly interested in the second page.
You do not need to explain the purpose for admitting evidence prior to trial or prior to a motion hearing. However, if you are attaching the document as an exhibit to a declaration, you typically need to lay a foundation as to what the document is and how you the declarant have personal knowledge with regard to it.
Frank W. Chen has been licensed to practice law in California since 1988. The information presented here is general in nature and is not intended, nor should be construed, as legal advice for a particular case. This Avvo.com posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, please consult with your own attorney.
If you are preparing a trial brief, reference to the exhibits by page and line # and purpose, is a good idea.