I don’t think they’re a back-up. I know I wouldn’t leave the one at the other end of the cable out, near the trans. so I don’t think it’s a good idea to leave this one out. They lock the snap on connector so it can’t be popped off. I remember now after seeing that video. Sounds like somebody is just lazy.
Yeah, I put mine back on, but it had been floating around out of place for a while, I think. Better to have it in place.