Sorry for the delay, my wife was out of town with her X, so I couldn't take the pictures until today.
All these pictures are from the driver's side seat, but the passenger side is exactly the same, just mirrored.
So, here is the seat control module:
View attachment 694490
I don't have any loose or unplugged cables lying around. I was able to trace (what I think) is the same cable in your second and third photo, and it is routed from one end to the actual fan, which is located a bit to the right of the seat bottom, connects to a plug on the middle of the seat, and then goes all the way back to the seat control module along the left side (the same side as the center console):
View attachment 694497
The only differences I could tell is that the male side of the cable on our X is wrapped in electrical tape, BUT the female side has the shiny black insulating tube, like the male plug on your photo. Also, we have a tag hanging from the insulating tube that says: Fan Assembly:
View attachment 694534
Just curious, has the Service Center agreed to change the
Gateway.config file on your X in order to enable the seat ventilation button on your MCU?