I am attempting to connect the Beolab 3500  at the other end of the house to my Beomaster. The Masterlink cable runs upinto the attic, where I am trying to connect both ends in that little white box, using the appropriate tool and everything. Sometimes I get the 3500 to respond when I press RADIO, but no sound comes out of the speakers. So I change the setting of the wires, and retry, and the 3500 does not respond at all. I have been at it for a forthnight, off and on, using chatGPT and Grok. The guy who installed the 3500 some years ago, used a cable with eight leads. Four of those are white, and then there is a brown, a blue, a green, and an orange one, and he connected this to the little white junction box, together with the leads to the Beovision and the 1614. I have tried to chart and map the leads, but so far, nothing works. Do I really have to pull both leads out of the attic again and test them, again, or is there som sort of standard setup? I get different input from different AI. And why are there just eight leads in the cable?