Print Orientation

Is there any documentation regarding print orientation? For example I am looking to print the Corner Bottom this morning. When I open the STL in Cura it is standing up on end. I am not sure if this is the correct orientation or if I should rotate it on it’s “back”. Thanks!

It’s been a few months since I printed the Primo parts, but I’m pretty sure Ryan saved the files in the proper print orientation. In particular, yes, the corners are printed on their ends.