This is a description of how to remove the XO person on the back of an XO laptop. This is part of the Disassembly section of the Troubleshooting Guide and Repair Manual.
Removing the "XO Person" on the back cover
It is recommended to swap covers to change the XO colors, instead of swapping just the "XO person"
Turn the back plate over. Note where the colored plastic fits in.
Use a screwdriver to pop these out
Turn plate over so the XO man faces you. Pull the plastic part out.
Note how the tabs fit in with the back plate.
Replacing the "XO Person" on the back cover
Fit the new piece in the back plate and snap it back in place.