Follow the steps leading up to the actual battery removal, but do not actually remove the battery.

Remove the two 3/32" screws that attach the motherboard to the battery compartment using a JIS #00 screwdriver.

Use your fingers or a pair of tweezers to remove the clip holding the ribbon connector in place. The connector is indicated with an orange marker.

Be sure not to apply excessive force on the ribbon connector, as it can break.

Find the speaker connector, indicated by a yellow circle, and using your fingers disconnect it.