Can someone tell me where I can find the filler cap to add/check power steering fluid. I have inherited my father's car and it is making sounds whenever I turn the steering wheel at low speeds or when I first start the car. Sounds go away once the car is warm and I am moving at higher speeds. I assume the fluid may be low and that is why it makes noises until the pressure builds.

I have checked the users manual and looked under the hood but can't seem to locate it??