It must have been the original owner that installed this. This is fourth owner and I know the second and third and they don’t know anything about it. The first Onwer only had it a short time and isn’t still around. It acts like a dimmer that has had it’s light removed. Nothing happens when it is switched on that I could tell. Since none of you 2002 H356 owners have one, it has to be owner installed. When the new owner asked I thought maybe it was an early 356 Hunter item that got changed.
If he wants,to open the Nav console I’ll help him and we’ll try to trace it out.
Thanks for the responses.