first of all we are going to remove the bottom plastic plates and the battery

I apologize for the bad light ( and my Englisch , my native language is dutch), i made this guide during night..

after removing the battery and plates you will see the HDD, wifi m-sata module and RAM. You will also see the bios battery ( next to the HDD).

like always i advise you to make a map/plan of the laptop. where the screws were attached , where connectors are attached.. etc. I tape my screws to the map i draw. You can also use the magnetic project map here on ifixit.

Be very carefull removing the HDD connector it is not that strong