Removing the screws, PH0, in the holes.

The battery cradle is glued with the same RTV as the top in some places, and one of the screw-hole-prongs is fitted over a sort of dovel, shown on the second picture with the red circles.

With two spudgers lift the cradle from where it's the strongest, as shown with red arrows on the first picture. Had to be careful as to not destroy the sides of the cradle where force was applied..