Single Stop is a U.S. nonprofit organization that offers U.S. colleges services and tools to help students achieve economic security. Its portfolio of options includes an online platform that screens students' eligibility for public benefits programs, a search tool that connects students to community and college resources, and case management facilitated by college staff. Single Stop also recommends that colleges embed other supports, such as tax services, to enhance the resources provided, as well as offer low-stigma opportunities to introduce students to Single Stop. This is the technical annex to "Connecting Students to Basic Needs Support: An Evaluation of Single Stop Across Ten Colleges," a study that examined Single Stop's implementation across ten colleges in Colorado and North Carolina, student take-up of the program across the institutions and subgroups of interest, and outcomes for students who used services. This annex presents additional data gathered during the research period for the report.