Identify and remove the internal battery.

The internal battery is held in by up to three screws, circled in red in the photo.

If there is no internal battery then remove the spacer shown in the second photo. This is held in by one screw.

Remove the internal HDD or SDD.

This is held in a carrier tray which is attached to the frame by a single screw circled in orange.

The data connection to the motherboard has a silver shield which is held in place by a single screw, circled in yellow in the photo.

Set the HDD and internal battery aside.