COVER PLATE

Does anyone know where this engine cover plate goes because I thought there were just the three plastic/rubber ones!? Left over after mechanic put engine back in after rebuild etc

If you look under your car at the join between the gearbox and engine, you'll see the bottom half of the flywheel, that's what this covers. It just bolts back on, but you'll need to remove the cross member to gain decent access, the gearbox will need supporting while you do this. Its not the end of the world if you leave it off, assuming you are not doing any off roading.