USB pin header cable - how to

Marcello New Member Posts: 156
Today I received the USB 2.0 pin header cables (Reference: OPT-UP-CABLE-USB-002).
However, they came without any explanation whatsoever. Specifically, in addition to the micro connector there is an additional 3-terminal pin header.
I can only guess this is to be connected to the GPIO to boost the ability to drive current... but i dont want to take any chances.
Could you please kindly provide the related documentation?
thank you.