Greetings: I'm trying to take the top plastic cover off of a Craftsman walk behind mower (model 247.372370), i've removed the 2 screws that hold it on the engine but there is something holding on from the front - I can't see anything and i really don't want to break it - i've found nothing on the WWW on this and the parts illustration from Sears is......well i don't have anything good to say about that.....any thoughts? Thanks in advance.