Remove the four marked screws.

Then, much like the cage, simply lift the LDS out of the slot.

One iteration of the LDS is smaller in size and is connected to the motherboard via cable connector. You will also see 8 screws, simply unscrew the inner 4, then lift it slowly, until you can flip it over and detach the connector.

If you have an LDS replacement, simply insert your new LDS and close the device up.