Where is the tank for adding fluid to my Mas Cylinder / Slave Cylinder. Located. on 1993 BMW 318is

Cant find it under the hood

Asked by for the 1993 BMW 318is
1 answer
iv had to replace my slaveslinder so the tank is the same tank you would put your brake fluid in it supplies fluid to the brakes ,and the slaveslinder. under the hood on the side of your fire wall