Sony PCG-Z505R - Manual (Page 67)

Adding Memory 57
5
Lift the keyboard from the LCD display side, then gently turn it over
on the space where the touchpad is. Be careful not to detach the cable
when lifting the keyboard.
6
If you are adding memory to the PCG-Z505RX, you must remove the
existing memory module. Follow the instructions in “To remove a
memory module” on page 59.
7
Remove the memory module from its packaging.
cable