Thank you everybody for your input and comments:
@engine builder, @stuart bridger, thanks for confirming its a ceramic connector
@Michael, I cannot believe that you managed to find such a site – geeks of the world unite! (on a side note, we have visited a museum of combs and a museum of the corkscrew down here – the comb one was good, the corkscrew one not really)
@Robert Dobbs, great, thats the one!
@Mike Poole, @Max tolerence, also great, I will follow up
Proof once again that the ME site has a wealth of knowledge waiting to be tapped!