That case is quite the mess, but I am pretty sure you can make do. It's gonna take some time, zip ties, and those zip tie anchors. You can make it look a lot better if you try to keep the cables as close to the motherboard tray, otherwise you will restrict airflow.
And, I wouldn't have purchased that case either, it was a poor design on Antec's side. You should have gone for a HAF, K-62, or a 690 II.
And, I wouldn't have purchased that case either, it was a poor design on Antec's side. You should have gone for a HAF, K-62, or a 690 II.