First, always use the washers if the manufacturer includes them.
It prevents the motherboard from shorting on the case. Bad...
Second, there is no expansion card. It's integrated onto the board.
The motherboard documentation states:
IEEE 1394
VIA® VT6308 controller supports 1 x 1394a ports (one at mid-board; one at back panel)
It's #14 in my picture, the RED one in your picture:
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