I just replaced it. This may not be the official way to do it, but it worked. I removed all the drawers first so I could easily access. Slid the right side pin in first, then you can fairly easily (no real pressure needed get the several clips in the middle inserted. Now you should be able to close it and the long pin on left side is sitting on top of the trough. They are almost exactly the same size so with direct downward pressure with the lid close on the far left side of the lid directly above the pin you can push, not too hard but a little bit of pressure and it should "snap" in to the trough. There is one SECRET I used. I used some lubricant on the trough and the pin. Before doing that it wasn't snapping in. Use something that is not toxic and not going to rot :). Don't need much, I just sprayed on paper towel and wiped on both surfaces.
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