Hi,
I'm assuming you want to remove the whole lid assembly, including the spring-loaded element
There are two screws, about 1.2 cms across, located on the bottom of the turntable in the rear corners. You will need to rest the turntable on a table or some other solid support so that the rear section overhangs by 5 cms or so to allow access to the screws.
Loosen the screws a little - half a turn or so.
Lift the turntable lid and at the extremes of the back plate there are the locking bushes for the two screws.
Keeping a finger on one of the bushes so it doesn't move, loosen the relevant screw so that the bush is raised a little - maybe 4-5 mm.
Repeat the process for the other screw and its bush.
You should now be able to slide the complete cover assembly back and away from the turntable body.
Hope that helps
Cleve