One of the best ways to find a primary source in CONSORT is doing a Subject Search.
When your results are returned, the subject you searched should be divided into different categories like time period, georgraphy or source type. Notice below, when doing a Subject Search for George Washington, the subject heading as you should enter it in your search is: Washington George 1732 1799. The results of this Subject Search will further break down the subject into categories highlighted below.
Washington George 1732 1799 Diaries
Washington George 1732 1799 Drama
Washington George 1732 1799 Early Works to 1800
Washington George 1732 1799 Encyclopedias
These categories or phrases attached to the end of your subject headings (highlighted in red above) most often indicate if something is or contains a primary source. Popular examples of these categories include: