Dell Inspiron 300m - Manual (Page 105)

Adding and Replacing Parts 105
9 Ground yourself and install the new memory module:
a Align the notch in the module edge connector with the tab in the center of the
connector slot.
b Slide the module firmly into the slot at a 45-degree angle, and rotate the module
down until it clicks into place. If the module does not click into place, remove the
module and reinstall it.
memory module
connector