Im using this as a reference: http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

The top 3 negative connections have the following pattern: Circle, Circle, Square.

Yes, if you cut off the first 6 on an atx from the left as show in the picture, the pattern is Circle, SQUARE, Square.

The shape of the 2nd plug is wrong. I dont think this will fit?

I am now thinking about buying http://www.newegg.com/Product/Product.aspx?Item=N82E16812200106 and cutting off the molex and soldering the wires from that to the negative and positive wires going to the psu.

Thoughts?