In this config, and only this config, it doesn't matter which way round they are, as long as they are the opposite way round from each other, ie, one has to point one way, and the other one the other way, but it makes no difference which one.
If it is D1 and D2, the square on the track is indicating polarity. Again, doesn't matter which but from the convention I can see with the other diode sneaking into the bottom with '3' on it, and for neatness, which is always worth striving for, I would put the cathode (the stripe) in line with the square pad