Where do we put the brake fluid. on 1998 Mercury Villager

We looked under the hood but have no idea where we put the brake fluid.

Asked by for the 1998 Mercury Villager
Look in the owners manual, it should tell you. Also look near the firewall on the drivers side.
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The reservoir is high up near the windscreen on the engine firewall. I think it is white reservoir with a yellow cap.

Sounds like that is it, should have a black hose at the bottom of it and two electrical wires I think for a sensor. Fluid should be clear but may be dark if it is old.
Ok. I have a plastic container near the windshield on the drivers side but its missing its cap.its small and its bolted to the car