Epson AcuLaser C9200 Series - Manual (Page 171)

2. Push the release button on the printer, and then pull out the waste toner collector.
c
Caution:
To prevent waste toner from spilling, keep the waste toner collector in the same orientation
as it was in the printer.
3. Insert the new waste toner collector all the way until it locks.
EPSON AcuLaser C9200 Series User's Guide
Replacing Consumable Products 171