I too saw that post (after searching the forums), but the connector that I am interested in "decoding" is the yellow one that can be seen to the very far right of the front panel connector. The Z620 USB front panel cable has the standard 20-pin USB 3.0 blue connector (which goes to the 20-pin connector on the USB 3.0 card), but the USB 2.0 cable has one row for the USB 2.0 port (red, white, green, black), and another row for "something else" (orange, orange, black, black). The "something else" row leads to some type of chip which is encased in plastic, which also aggregates the USB 3.0 connectors from the 20-pin USB 3.0 header cable.
Yellow Header (p27) that the USB 2.0 cable connects to:
Normal USB 2.0 Pins on Z620 USB 2.0 Cable
What are these Pins on the USB 2.0 cable / header?
Here is the "chip" that the orange, orange, black, black pins on the USB 2.0 cable / header lead to. The large cables on the right are the input leads from the USB 3.0 20-pin header on the board. The two large cables on the left are the leads to the USB 3.0 ports on the front panel. I cannot see what is inside the casing w/o destroying it, so hopefully a pinout of the P27 yellow USB 2.0 front panel header on the Z620 board will lead to clues as to what these four cables do.
