EVGA X299 Micro User Manual page 40

EVGA X299 Micro (131-SX-E295)
USB Headers
The motherboard contains 1x 19-pin internal header connectors onboard that
can be used to connect an optional external bracket containing up to four (2)
USB 3.0 ports. This board only has USB 3.0 headers, the label below is because
they share the same pinouts.
Secure the bracket to either the front or rear panel of your chassis (not
all chassis are equipped with the front panel option).
Connect the end of the cable to the USB 3.0 headers on the
motherboard.
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