Dell XPS 15 (L521X, Mid 2012) - Manual (Page 19)

2 Turn the base-cover assembly over.
3 Starting at the indicator on the base-cover assembly, carefully turn the
system badge over.
4 Release the tabs on the system badge from the slots on the base-cove assembly.
5 Lift the system badge off the base-cover assembly.
2
1
1 system badge 2 tabs (2)
Removing the System Badge | 19