Keycera FS 1300D missing a part

[arditshala]

Hello, I bought an used Kyocera FS1300D printer, then I bought the color(Cartridge-Toner), but fur sure something is missing, when I try to put the cartridge inside the printer I cannot secure or connect it anywhere, and when I googled for photos of the printer I saw that my printer is missing something in the middle, but I do not know how to find the name of that part, can someone help me?

Look at this picture, I don't have that purple thing in my printer, that is what is missing