Am I missing part of my Tip On push catch?

I only have 4 parts in the catch packet: the cylindrical catch which features the push in magnet, a flat doughnut shaped metal washer which the small screw goes into holding the metal washer in place which I understand is what goes in the door, and lastly a flat, rectangular metal part with curved ends featuring a removable sticker on one side. I don't know what this last part is for but more importantly I don't see how the cylindrical catch can be installed into the frame, am I missing a part? In a video I saw and on the packet picture, there is what looks like a rectangular mounting plate which the cylindrical part slides into but that did not come together with this. Any help is much appreciated. Photos here are not working so I hope my description is good enough. 

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