Fiber optic dinghy monotoring

We will begin our journey soon and have been preparing for months to tow our Durango 4 wheel flat for the first time. Like may others I worry about the reliability of motion operated bake assist systems. I began to think about how I would monitor the unit while in transit. At first, my rear view camera seemed like a viable option because it has the audio and I was hoping I could hear and notice any brake binding but I doubt if I could detect a slight brake malfunction. Has anyone ever used fiber optic cable? I don't have any experience with it but it seems to me that you could install on end in your toads brake light housing and run the other end to a monitor in the RV dash. That way when the toads brake is depressed (even slightly) you will be able to see it via fiber optic monitor.