You will need to drill a hole at the top-back part of the cover to get it to stay down on the top. Just take a rubber mallet and place the engine cover in the proper place. Tap the cover were the screw is and it will make a mark on the inside of the cover. Drill that out and use the screw to hold it into place.
Can you show me a picture of the top back part cover? Where to drill a hole? Thanks