THe Cubans built a fairly close copy of the "panopticon". Which puts the guards in a center tower/island, but with the ability to observe the cels 360 degrees around them. THe prisoners cant observe if the guards are watching them, due to mirrored windows. THere is no privacy from the guards.
Or they could emulate the prison from the Disney + show Andor with it's eletrified floors and very limited access halways. The one error of design they did was the windows on the access tunnels giving the prisoners an idea of how large the facility was, and a way to communicate line of sight to other prisoners above and below them.