FPC flex cable, Microsoft Surface Pro Signature

My Microsoft Surface Pro Signature keyboard suddenly stopped working, I tried several software solutions and nothing worked. Then I proceeded to disassemble the keyboard, and I found that the internal flex cable was damaged, as it had very small tracks, it was impossible for me to reattach them, and I ended up damaging the flex cable even more. Integrated in this flex are the backlight tracks, signal tracks and the tracks that power the wireless charging of the slim pen 2. The flex cable that connects the detachable keyboard to the tablet is broken, therefore the keyboard stopped working completely and it also does not charge the wireless pen. I uncovered it completely, and the flex is completely separated from the base of the external connector of the keyboard that is inserted into the tablet. I would like to know where I can get the schematics for this connector, know how the flex is connected to the connector pins, how the keyboard backlight is connected and how it is connected to the keyboard motherboard. or if anyone knows the function of the 6 pins of the connector, or if they could help me with some other solution. Please The FPC cable contains the following numbering: "MFS M1110070-012"