It seems to me far more likely that it would be possible to connect to the chargee (!) than that it would be possible to make the chargor (!).
I don't know what you mean by this Robin. My post was about knowing how we can connect to the item to be charged with no information about how to connect (wiring etc,schematic , connector pinout , all the usual stuff) . I don't really follow your response or the significance of the explanation points. Can you enlighten me please ?