Compaq Armada 1500c - Notebook PC Reference Manual page 39

8. Insert the new memory board at a 45 degree angle and gently
slide it into place until it is correctly seated.
The memory board is keyed (notched) slightly off
center to help you position it correctly.
9. Rotate the memory board down until it snaps into place.
10. Replace the keyboard by gently positioning it back down
over the internal components. Close the display.
denoted by arrows in the illustration to ensure correct
positioning.
Align the top of the keyboard with the four tabs