Lenovo 8GB DDR4 2400 Laptop Memory Module

3. Align the memory module with the anti-insertion notch; if it doesn't fit, try rotating it.

4. Align the module with the notch and insert it into the memory slot at a 45° angle.

5. For laptops, ensure the anti-insertion slot and memory align properly, then press down until you hear a click to secure it in place.