Connecting the usb-pins on my board. What is OCO ?

Hi,

I´ve a board P6ISA-II and I´m trying to connect my front-usb to the pins on
the mainboard.

I downloaded the description/picture from the site, which tells, there are
two rows of 5 pins each.

I can connect all pins, but I haven´t got the two OCO-pins to plug onto the
board (one for each row of pins). Instead I have ONE "shield" to plug on.

My question: Is OCO the same as SHIELD (what does OCO mean), and if so, what
to do with the second OCO-pin on the board. If not, what to do about the two
OCO-pins?

Thanks for any help.

Axel