The Induction Hotend Rack Cable Pack contains two essential connection cables for the Vortek system:
A combined communication and power cable between the rack control board and the MC (Motor Control) board, which ensures stable transmission of control signals as well as power supply to the hotend rack.
A connection cable between the rack control board and the bolt actuator of the induction hotend, responsible for transmitting the status signal of the internal plunger.
Further information can be found on the Bambu Lab Wiki.