I remove the electric box top then unclip (not the metal clips) the connectors from the inside of the electrical box.
The electrical box cover will come off with a little effort. I used a screw driver to help unhook the fasteners.
Let me see if I can post a pick of inside the of the electrical box. It should show how the connectors can be un hooked.
This will give you more wiggle room to attack the metal clips.
Good Luck.
