Insert the NVRAM/TOD module and its carrier into its socket on the main logic board.
The carrier is keyed to ensure correct installation of the NVRAM/TOD module into its socket on the main logic board. Make sure that the NVRAM/TOD module is placed into its carrier correctly. The small marker dot on the top of the NVRAM/TOD module should be on the same side as the narrow tab on the carrier assembly.
Push down firmly on the NVRAM/TOD module until it seats in its socket.