The Dell Latitude 12 Rugged 7202 and Rugged Extreme 7212 Tablets have the ability to expand the functionality of the computer by connecting accessory modules to it.
Each Module attaches securely to the back of the tablet when fitted and can be removed to reduce weight when not in use or needed.
(Figure.1 Tablet Rear View)
The extended I/O module pictured above consists of:
Seat the module at the back of the tablet. It locates above the batteries and on top of the Pogo-pin connector on the rear of the unit.
(Figure.2.1 Seat the module at the rear of the tablet)
There is a screw in each corner of the module and a corresponding hole on the back of the tablet. Locate the screws to the four (4) holes and tighten until secure. (The screws are Thumbscrews. This means you shouldn't need any tools to fit or remove the module. There is a D-ring on the head of the thumbs that flips up and gives you a better grip for tightening or loosening the screws.)
(Figure.2.2 Tighten until secure)
Removing the module is as simple as loosening the four (4) thumbscrews until the module releases from the back of the tablet.