Dodge 2007 Ram Pickup 3500 - Manual (Page 208)

The rear storage compartment can be divided into three
separate compartments by using the divider doors inside
the storage compartment. Plastic Grocery Bag Retainers (Mega Cab
Models)
Retainer hooks which will hold plastic grocery bag
handles are built into the back panel of the cab, behind
the rear seat.
Mega Cab Rear Storage Dividers
Grocery Bag Hooks
208 UNDERSTANDING THE FEATURES OF YOUR VEHICLE