Are you trying to install the Dell Media Card Reader? If so then the other end of the ?FlexBay USB cable that plugs into the card reader goes into a small rectangular connector towards the back of the motherboard. Specifically orient as follows; place the computer on its side, the power supply to your left and the front of the computer facing towards you. Starting at the back of the motherboard next to the power supply follow the back edge of the motherboard till you come to the approximate center of the board. About an inch towards you there will be a rectangular connector the FlexBay USB cable end should fit into. If this isn?t the cable from the Dell Media Card Reader let us know and we?ll try to help, otherwise please don?t forget to rate this posting.
Usually answered in minutes!