It needs to be enabled and disabled easily, not something permanent for the entire game. Also I am pretty sure the camera module you are referring to only works on the X axis.
You should be able to manually limit it with some code like this:
local RunService = game:GetService("RunService")
local function directlyAfterCamera(delta)
-- Code in here will run directly after the default Roblox camera script
-- Clamp the camera's rotation to something within the limits here
end
RunService:BindToRenderStep("After camera", Enum.RenderPriority.Camera.Value + 1, directlyAfterCamera)
To stop it, you could either disconnect the connection or just use an if statement inside the function to check if the limits are enabled.