To replace the memory DIMM, put the DIMM into the socket at an angle and push down until it seats.
Rotate it down until it latches.
To replace the palm rest, connect the TouchPad ribbon cable to the systemboard, and starting at the front edge of the chassis, rotate the palm rest into position as shown, making sure the top corners of the bezel are secure.
Turn the machine over and replace the four palm rest retaining screws.
To replace the battery, align the battery on the rails and slide it in place until it latches.