Ron I fed the first 100 with data, power and ground, then connected a 2 wire plug with ground and power but let the data feed through and this continued for the first 600 pixels. So you will have one 3 prong plug and five 2 conductor plugs. This feeds a total of 600 pixels and will be calculated Amps of 27.2 for one PS.
The Controller is in a CG1500 Box with the Power coming off Hella Spade Terminal Blocks.
I have this entire setup on a 2' x 2' Plywood piece with 2 CG1500 to the left one on top of each other feeding the Hella Blocks for power (Each PS feeds one block on the soldered grouped connector side) All Grounds go into the Ground Block so the three conductor has the data wire go into to controller, 12+ to the Hella Block (some of the other 12+ connections will go together on the spade that connects to the block)
I will try to get some other photos that may help