To start dissembling this wii remote, turn it over and take the back off.

Then take the screws out and pry off the back, you should have four screws, 2 from the top and 2 from the bottom.

You need to pry off the back (do this carefully) , open it in half it should look like this (second picture). Take the motherboard off slowly and carefully, you should have 3 parts (third picture)

From this part of the control take these pieces off carefully. You should have these pieces (second picture). After you should have something that looks like this (third picture). You have successfully disassembled your wii remote.

This will show you how to reassembling the wii remote if you are having trouble.