They're showing you how to wire a series/split/parallel switch, for two different kinds of switch. That's what it would look like underneath the pickguard/control-plate, if you had it turned over.
The left one is a standard small switch, the right one a blade-style switch like a pickup selector on a Telecaster.
The pickup in the shortie Stingray is already some special designed neodymium pickup. I'm not sure why they did it this way but it's higher output, higher dynamic range due to lower impedance (potentially I didn't check the resistance), and it pulls on the floppier short-scale strings a bit more. Im curious if that last part was intentional on their part to bleed some energy off the strings.