Konica Minolta Bizhub C652 Imaging Unit Tab

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Hello! Thanks in advance to anyone reading this post. I'm in need of a part, but don't know what it's called. There's a tab for each of the CMYK imaging units. The black tab has been broken off and is missing. Does anyone know what these parts are called and where I can get them?? See the picture for what I'm referring to.

Thanks!

KM_Bizhub_C652.jpg