UAT (User Acceptance Testing)

Im preparing to create a UAT for a huge project (Disaster recover and High availability project between two centers (HQ & DR)).
Anyhow, my question is how to write UAT document and what to mention in it as i don’t have business users in my project and what i have is a project for DR only (servers, networks, LTMS, GTMS, SAN Storages,..etc)?
It’s a huge project, but i can’t imagine the figure of the UAT document & what the test cases will be !
plz your help.