Channel Plate.
I used my heat gun and gently heated and flattened out the plate the best I could. After trying to fit it back onto the cabinet, I could see that the plate had shrunken some. To get the plate to lie flat I filed the round mounting holes till it fit properly and centered over the hole in the cabinet.
With the holes filed out I knew the brass retaining clips won't work. So I came up with the idea of using some #6 flat washers and some 1/8" model airplane fuel line. The fuel line is a tight fit over the mounting posts. The washers are just the right size to go over the posts and then the fuel line can press against the washers "pulling" the Channel Plate onto the cabinet. The pieces of fuel line were left long so if I had to remove them I could grab it with a pair of pliers.
