Take your Cassette upright with the cables facing you – with the tab of the RJ45 connector on top to patch to a switch above the PATCHBOX. Or with the RJ45 connector on the bottom if the switch you want to patch to is below your PATCHBOX. Doing this avoids bending the cable.
Slide your Cassette into the Frame until you hear a “click” – this means your Cassette is locked into the Frame.
To remove a Cassette, squeeze its top and bottom lock to unlock it from the Frame. While squeezing both locks, simply pull the Cassette. (If pressing the tabs does not release the Cassette, also slightly pull the connectors out of the Cassette as they might be blocking the tabs.)