Within the curly brackets (i.e., '{}'), insert the pathway to the reference .bib file. Even if the .bib file is located in the same folder as the LaTeX .txt file, it's still good practice to enter the location. Once this location is specified, you will be able to add citations in the text as you write without having to go back to Zotero. The standard code for adding a citation with LaTeX is: \cite{.}, where the period is replaced with the desired cite key. However for compatibility with the biber citation formatting, adding a citation is done with: \parencite{.}, where the period is replaced with the desired cite key. Of course, citations sometimes need the author suppressed or accompanying notes. LaTeX can also accommodate these as well.