Model "A" Tail light Question

Howdy! Anyone familiar with Model "A" tail lights? I just bought a pair for my Jalopy. I confess, I dont know which half is which. The top half is kind of cresent shaped. The lower half is oval shaped and a little smaller. Each has a separate bulb behind its lens. Which is the tail light and which is the brake light? Thanx.

Taillight is on the bottom. Brakelight is larger on top

Snoozy: You make me feel pretty stupid.I sold my 1930 Model "A" in March & I have no clue as I never had to work on the taillights.I drove that car for years but did very little work on it.Spark plugs one time and points a couple of times and that was it.Sorry man.Calspec