I just finished retiring a fleet of Dell 2400's and still have several around
(no longer in service), they take an IDE optical drive, nothing special
What exactly is your question?
you need to remove the case side and pop the clips to remove the front trim
to remove/install the drive from the chassis.
then after reinserting the drive into the metal chassis re-install the plastic face plate....
the drive will not go in or out with the front trim installed.
But the drawer functions fine.