Installing Options 4-74. Firmly press the cover against the chassis and slide the cover towardsthe front of the chassis until it locks in place.Note If the cover does not slide all the way to the front of the chassis,check that the cover tabs at the front of the cover are properly inserted intotheir slots in the chassis. Also check that the locking tab is inserted into itsslot on the back edge of the chassis.5. Replace the two previously removed thumbscrews.6. If you have a padlock for the locking tab on the rear edge of thechassis, install it.7. If your system is set up for use as a minitower, place the systemupright.8. Reconnect all external peripherals.9. Plug in your power cables.Removing the Front PanelRemove the front panel if you are installing an internal 3 1/2-inch harddrive or installing a device in one of the accessible device bays.Remove the front panel as follows.1. Remove the cover (see “Removing the Cover” earlier in this chapter).2. Position the system on its side on your work table, with the frontpanel over the edge of the table.3. Working from inside the chassis, press up on the two front panellocking tabs to release them from their slots on the edge of thechassis (see the following figure for tab location).4. On the right side of the front panel, at the top corner, press in on thepanel to release the top.5. Pull out the top of the front panel while pulling up on the panel torelease it from the chassis. Set the panel aside.