USB 24 Pin

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USB on the 24-Pin Flex Connector

The 24-pin flex connector has USB port 1 on it. When you're looking at the verdex board as show below, pin one is on the left, and pin 24 is on the right.

24-pin flex connector orientation

The connector is described here. The pinouts you need are:

V_BATT (pin 24) - USB power
USBH_N1 (pin 18) - USB D-
USBH_P1 (pin 17) - USB D+
GND (pin 8) - USB Ground

In addition, you need to pull USBH_PWR1 (pin 20) up to 3.3 volts to enable the port. You need to provide a stable 3.3 volt supply, which is fairly simple to do by adding a small SOT23 package voltage regulator (like the LM3480), with the power input coming from V_BATT (pin 24) and the output going to USBH_PWR1 (pin 20).