I called Dream Cars South and the guy that helped me was not aware of any type of strap. What they do install at times for South Motors is an after market alarm system with a sensor for the lights, similiar to what we do with the factor alarm I would guess. Quadcam see if you can get some more details from your buddy since the store is unware of what I was talking about. I have also e-mailed a sales person at south to see what they tell me.