Best way to open a Plug?

Hi there.

Anyone know the best way to open the smart plug? Looking at opening the PG05V2-AU16A-ESP-1?

I'm surprised for a product pushing the open software angle, that the plugs can't be opened easily, they appeared glued together rather than screwed. Making flashing them if they get bricked a issue down the track.

For me, I would like to remove relay, I just want to use these plugs for pure power monitoring with zero risk of the plug ever being turning off.