Erm, help you with what exactly? If you're asking for an installation guide for the Kraken x61? Then
follow this guide. If you're asking where the optimum area/placement for the x61 inside the Phantom 820 will be? Then look at the top mounting spots inside. Have the fans exhausting the air to the top of the case. With the fans placed either outside the case or inside under the radiator.
If you're inquiring about the fan controller then have your radiator fans run off the daisy chain cable bundled with your x61 while connected to the x61. The fan controller should be left to manage your case fans and your fan controller can handle 15W per channel/header.
Cablemanagement 101;
when dealing with wires, run them individually and isolate them. You can try and take some masking tape, a felt pen and labeling each bundle as you work with them.
I'm sure you got worried upon seeing this bunch
Don't worry, just take it slowly and work your way up or down however you feel comfortable.
You could shoot some pics if you'd like help managing cables though.