Bottom Side - Asus T302C E-Manual

Bottom Side

Dock port
Connect your ASUS Mobile Dock to this port to support
keyboard, touchpad, and USB port functions.
Hinge holes
Align and insert the latch hooks into these holes to securely
attach your ASUS Tablet to your ASUS Mobile Dock.
MicroSD card slot
This built-in memory card reader slot supports microSD and
microSDHC card formats.
18 ASUS Tablet and ASUS Mobile Dock E-Manual