Start at the top and run each power & ground wire down to the panel below it, stacking terminal rings as needed. Leave the last row unscrewed as shown in the photo below. Longer cables will be attached to provide power from a power supply.
Sometimes the panels we get use Molex plugs and have wire pigtails. These are more secure but are not as elegant to wire up the power. You can strip and solder the wires together instead.
We suggest cutting out the yellow wires so you don't accidentally connect to the 12V lines.
Twist together the red wire from the connector and the red cable. Heat the twist and apply solder until it is flowing through the entire connection. Fold it over and slide a piece of heat shrink over it. Repeat this for the twisted black pair and use a lighter or hot air gun to shrink the heat shrink over the joint.