how do I set it up to receive all my holds at the Benson branch?
You can always designate a pick-up branch when you place the hold, but if you would like to make the Benson branch your default branch for picking up holds, you can log into MyOPL at https://omaha.bibliocommons.com/user/login (or, from the main page at www.omahalibrary.org, click on Check My Account under the Catalog tab at the far left), and then, when you are in your user account, click on Preferences (at the left, under My Settings). There you can select your preferred location. You can also call any branch and ask to change your pick-up location, either on a permanent basis or for a particular hold.
Hope this helps!