TA Triumph-Adler P-C4580DN - Manual (Page 264)

Maintenance
7-6
4
Insert into the provided plastic disposal bag.
5
Gently remove the new waste toner box from its packaging and open
the cap.
6
Install a new waste toner box.
7
Press the specified position to close the waste toner tray. When the
tray reaches the correct position, it locks in place with a clicking
sound.