This is a delicate part and may require a magnifying lens.

Locate the brown serial connector on the left side of the device. Using the flat head screw driver, push the little tabs (one on each side) out towards you as pictured.

They should extend about 1/16 of an inch (1.5 mm).

Now take the screwdriver/tweezers and gently pry out the serial tab as shown .

It is flexible but don’t bend it back and forth too much as it will eventually break.