Abstract: A brake actuating device for a motor vehicle brake system comprising a hydraulic unit has a side face, on which an electric motor is arranged. The electric motor drives a pressure generator, located in the hydraulic unit, for conveying a hydraulic fluid. The hydraulic unit comprises a first plurality of location openings in the side face. An adapter unit having a first connecting surface is arranged on the side face of the hydraulic unit. The adapter unit comprises a second plurality of location openings in the first connecting surface, wherein each of the first plurality of the location openings of the hydraulic unit is connected in fluid communication with one of the second plurality of connection openings of the adapter unit. The adapter unit comprises a second connection surface having a plurality of connection openings for fluidically connecting wheel brakes of the motor vehicle brake system.