This guide will help you configure your EBSCO Discovery Service (EDS) instance to work with the OpenAthens Redirector.
Whilst our the OpenAthens service desk will always try to be helpful, they can only support the OpenAthens end. Information about EBSCO was correct at the time of writing.
To apply the Redirector prefix to persistent or custom links, follow their guide at: https://help.ebsco.com/interfaces/EBSCOadmin/Admin_User_Guide/how_can_I_embed_Proxy_Server_settings_in_EBSCOhost_URL
If having difficulty, your EBSCO support contact may be able to help: https://connect.ebsco.com/s/contactsupport