Solder the socket right over those holes. They are just vias (they just carry current from one side of the board to the other side). The diodes (D1, D2, etc...) have a band on one end of them. And the picture of the diode on the control board shows a little stripe that indicates which way the diodes should face. It's sort of hard to explain.
If there's a dot on a chip, that dot should be closest to the notch on the schematic. Tell me each thing you are confused about and I'll try to explain how it goes in.
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