Installing bezel on optical drive

I have an Inspiron 17 5770 that came with an optical drive, Part No. 9M9FK.  I have to replace the bezel, Part No. 3DTJ0.  I attached a couple pics, but I'm not sure how to get the new bezel to snap in place.  The pics will help, but the bezel has a prong on one end and a flat tab on the other.  It's obvious which tab mates with the square and flat slots on the drive.  My problem is getting the flat tab to mate fully with the drive.  I suspect that I must push it downward with a small screwdriver while pushing it in, but it's rather flimsy and and I don't want to break the tab.  Thanks.