Clutch Master Cylinder Mounting

Hi all. I bought and received the master cylinder mount today; it's a great piece of engineering. Not sure if I will be using it in a car yet, but the piece is well worth the money.

In post #65 showing a master cylinder mounted in a yellow car, shouldn't the upper fluid line be connected to the fluid reservoir, and the lower one to the slave? I am thinking that any air bubbles in the master cylinder would want to float upward, and therefore would travel more naturally up to the reservoir.