If it's where I think it is, use a mirror to check the level, and you can buy a hose/pump to fill if needed. The hose kit fits a gallon can (!), which is what I have (I work in a shop). I suppose if you were adventurous you could have an assistant hold a pint bottle in the air, and siphon brake fluid into the reservoir if needed. The voice of experience says brake fluid doesn't taste very good...