Well, you're more educated than me
but that's a thing: if you have 1/4 turned 45 degree and 90 degree adapter turned into same direction - you'll compensate 1/3 of adapter heigh and whole width of fitting which in other case will be addictive to whole construction heigh, adding 45 degree adapter turned into opposite direction will make outlet parallel with motherboard, but definitely will introduce spacing issues, still, you definitely can fit apogee in sv590 if you don't scared of stacked adapter monstrosity
You might be right, I will take a close look at my ghost today, and really see how much spacing there is between side panel and fitting.