considering that you have 3 HDD, no mobo holes, horrible 24pin placement on the motherboard, I give it a 6.9/10
suggestions: zip ties, zip ties, zip ties. take the 2 front panel connectors on the bottom left of mobo, run top one straight down to the bottom one and ziptie. pull them straight to the right nice and snug to bottom of mobo, and zip tie them with the other front panel connectors (after pulling them straight down). then you see the very small hole on bottom right of mobo tray? take the front panel wires and ziptie them to that hole.
Follow same basic procedure throughout. Right angles are better (my opinion anyway) than loops/bends/curves.