Detachable Back Panel - Google Nexus 10 Manual Book

Detachable back panel

The back of the Nexus 10 includes a detachable panel across the
top. You can remove it to view the regulatory marks, or to attach
an accessory that snaps into place the same way.
CAUTION: Please remove the panel slowly and carefully to
avoid damaging your fingernail.
NEXUS 10 GUIDEBOOK
Lift with fingernail
to detach
APPENDIX 155