Two screws holding a speaker underneath. It's not magnetic. It has two cables which I've traced back to this box behind the panel on the passengers side.
Probably for an antenna for a mobile phone car fit, they usually have a stick on inductive piece like that and antenna on the outside Could also be for a cb radio?
Is it only connected to one cable? Where does the other one go? Say anything on the box. Outside chance it's a GPS antenna for a tracker.
It has something like pre commissioned These units dont display LED It's like a fitted cable at the dash end down to those two brass fittings in the pic. Then a wire going somewhere else's It's blowing a hooly outside so I'll check where the cable ends up next time I'm out at the van. I was hoping for a straight forward answer but that was optimistic