102 Installing System ComponentsInstalling a RAID Battery1 Insert the RAID battery into the battery carrier (see Figure 3-21).2 Insert the battery carrier and RAID battery into the system’s battery carrierslots, ensuring that the battery carrier is aligned and fully seated in the slots.3 Connect the battery cable to the SAS/RAID controller card. See thedocumentation for your card for more information.4 Route the battery cable through the battery cable slot in the chassis (seeFigure 3-21).5 Replace the system cover (see "Installing the System Cover" on page 67).Remote Access Controller Card (RAC)The optional Remote Access Controller card provides a set of advancedfeatures for managing the system remotely.Removing the RAC CardCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.1 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet and from the peripherals.2 Remove the system cover (see "Removing the System Cover" on page 66).3 Open the expansion card cover (see Figure 3-7).NOTE: You can remove the expansion card cover, if desired, and set it aside.4 Open the expansion card latch adjacent to the slot (see Figure 3-20).NOTICE: When detaching the RAC cables from the system board, squeeze themetal ends of the cable connectors and gently work the connector out of thesocket. Do not pull on the cable to unseat the connector. Doing so can damage thecable.5 Disconnect the ribbon cable to the RAC card.