A control unit for a transmission control module of a motor vehicle transmission includes a circuit mounting device and at least one attachment device configured to attach the circuit mounting device to a carrier board. The circuit mounting device includes an electronic circuit and has a first bearing side with which it is configured to be pressed against a second bearing side of the carrier board by the attachment device. The attachment device has at least one attachment element which is connected to the circuit mounting device and protrudes with a first end from the circuit mounting device on the first bearing side. The attachment element is configured to project through an attachment opening in the second bearing side of the carrier board.