I didn't know in first moment how to set cables on best way because I don't like to bend cables to much to fit in first hole with rubber grommets.
Special VGA cables... Than I leave cables to go outside from next big hole than VGA cables back inside through other hole with rubber under all other cables and up in graphic card.
And one Velcro keep them on place with cables 24pin, CPU, SATA, Molex,.... I will show you better on pictures with light.