Align the connector with the socket so the tab on the connector lines up with the notch in the socket. Make sure the holes in the connector fit over all the pins in the socket and then push in the connector.
align the holes with the pins, you your computer when you push
7.Now connect the hard disk drive cable in the same manner.
8.To replace the front panel, fit the three ridged tabs on its bottom edge into the three notches on the lower edge of the computer, as shown below.
tabs
9.Tilt up the front panel until the tabs on the top of the panel touch the computer. Then push on the top of the panel until it snaps into place.