Looking good XP Rider.
As far as the pot tabs go - they are not all equivalent. The outside tabs (end terminals) are the ones that connect to either end of the actual resistor, while the centre tab is the connection that goes to the sliding contact which can be moved and varied.
The Pitbull wiring normally has the volume pot with one end connected to ground (soldered to the back of the pot), the pup hot wire is connected to the other end connection (this is the volume input), and the centre tab is the volume output which then goes to the tone pot. A low volume output uses a large resistance between the input and output (the sliding contact is far from the input terminal), while a high volume output uses a small resistance between the input and output (the sliding contact is close to the input terminal).
For these pots, the flow of the current does not really matter. So, the same result can be created by switching the positions of the volume input and the volume output. So, having the hot wire from the pup to the centre tab and the volume output being the end tab works the same way.
NOTE: our guitar circuit diagrams show the backs of the pots (not the top).
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