Replacing Magnetic Gaskets on GE

I have recently purchased replacement Refrigerator and Freezer magnetic gaskets (WR24X450 and WR24X449 - respectively) from this site - but I have no clue how to install them.

The model I have listed is the exact model on the fridge, but it doesn’t show up on the site, but it appears that TBX18DASERWH takes the same parts. And I just don’t see anything obvious in the diagrams for that model that show me how to take the gasket off.

Do I have to take the whole door apart?

Thanks in advance.

Looking at this diagram you can see screw holes in the door that the gasket fastens to. I assume it has some kind of flat bar that hold the gasket against the door. http://c.searspartsdirect.com/lis_png/PLDM/10038406-00001.png