Instructions
Open the battery cover on the back of the Wii Remote. Insert two fresh AA batteries.
Turn the Wii on. Open the "SD Card Slot Cover" on the front of the Wii.
Press the "Sync" button on the bottom of the battery compartment. The lights on the Wii Remote will flash. Press the "Sync" button inside the "SD Card Slot Cover." When the lights on the Wii Remote stabilize, the sync is complete. Replace the battery cover. If you're using a Nunchuck or Classic Controller, insert the Nunchuck or Classic Controller cable into the expansion port on the bottom of the Wii Remote.