Technically, that's a wiring diagram. A schematic doesn't draw the physical wire layout.
Are you looking for how to wire stacked TB pots, different from the separate pots shown here? The only difference is the physical layout of the pots. One is atop the other.
If you want to know the PUP wires: Black is hot; green and shield are ground; red and white connect to each other. This wires the dual coils in series.
Perhaps these links will help:
Series coils (most common) parallel coils
Series coils give higher output but a different tone than parallel coils.
