Reserve Battery: Dell Latitude C610/C510 Service Manual
3 system board connector 4 reserve battery cable
Replacing the Reserve Battery
1.Connect the reserve battery cable to the system board connector.
2.Position the reserve battery above the speaker connector on the system board.
3.Update the BIOS using a flash BIOS update program floppy disk or CD. For instructions on how to flash the BIOS, see "Flashing the BIOS."