Question about BitFenix Phenom Mini-ITX, white, o. NT

Hello,
I had installed a be quiet! Steraight Lower E9 (580W), approx. 160mm long. However, I removed the HDD cage for this. It's possible that it also works this way, but since I didn't need it, the cage was removed.
The cable management is a bit stupid, but since there is no side window, this is not so tragic.