Hi,
thank you for the warm welcome.
Great! I could figure out the rubber piece. That helped. Thanks for that.
Ok. regarding the top right connector, i cannot see how the cable has been originally installed. I would have assumed it is soldered in, but it was not, there is just rubber-like material on top of it. So i am not sure if I can reattach that. if it is just for the headphone socket and Remote control, that would be ok, as this was never used.
But how does the device connect the ground base station on the floor (the box with the telephone cable). I guess that is one of the chips?