I have the 932, so it's close enough.
You have the same PSU as me actually, so this should be fun.
Only connect the cables you absolutely need to use. That's an obvious point, but one still worth making. Take all the wires down through the bottom hole, and let them just drape out of the back. Start with the 24-pin connector, up the side of the mobo tray, next to the cable tie spots, then out of the top hole to the motherboard. The GPU Cables are a little longer than needed, IMO, so run them first towards the back of the case then being them back to the front so you can run them out of the bottom large hole, and connect into your GPU. If you put a HDD in the last spot on the rack, you can easily hide cables under that as well, which I did when I didn't have a modular PSU.
If you post a picture of what you have now I can give more help.