Thank you, guys for this thread, i just finished this mod and it works well! Now I'll tell you how I made the missing wire from the XY400 connector, did not want to drill the bottom and just made the missed pins myself from a suitable wire and inserted them into the necessary slots. To do this, you must first pull out the blue seal plugs with any sharp object, then insert the needle with force and measure the depth (it’s about 4cm length), and make homemade contacts from wire or conductive metal. I just soldered them to the wires from the CAN BUS hub and, using pliers, inserted them into the empty sockets of the connector. Today I checked it on the road, everything works. I think this is the easiest way to make this missing cable, without drilling and disassembling the connector.