A method of aligning a crimping tool of a crimping cassette in a cable processing apparatus, wherein the crimping cassette comprises a crimping tool having a stationary tool part and a movable tool part, wherein the crimping cassette further comprises a holding device having at least two claws (21a, 21b) for attaching to a mounting part in a mounting area of the claws (21a, 21b), the mounting part being directly or indirectly fixed to the stationary tool part, wherein the holding device has: a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, wherein the cable processing apparatus comprises a tensioning device for the mounting part adapted to apply a tensioning force to the mounting part relative to an attachment surface provided on the crimping device, wherein the stationary and movable tool parts of the crimping cassette are configured to act together in a crimping operation of the crimping device of the cable processing apparatus, wherein the method comprises: Bringing the holding device into the unlocked closed position; Releasing the tensioning device; Inserting the stationary tool part of the crimping tool into a tensioning area of the tensioning device; Moving the moveable tool part towards the stationary tool part slightly before the moveable tool part touches the stationary tool part; Bringing the holding device into the open position; Moving the moveable tool part towards the stationary tool part until a pressing force between the moveable tool part and the stationary tool part is reached or exceeded, such that an alignment within the adjustment range takes place between the moveable tool part and the stationary tool part; Applying a tension with the tensioning device. wherein the crimping cassette comprises a crimping tool having a stationary tool part and a movable tool part, wherein the crimping cassette further comprises a holding device having at least two claws (21a, 21b) for attaching to a mounting part in a mounting area of the claws (21a, 21b), the mounting part being directly or indirectly fixed to the stationary tool part, wherein the holding device has: a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, a locked closed position in which the claws (21a, 21b) are firmly clamped to the mounting part; an unlocked closed position in which the claws (21a, 21b) loosely grip the mounting part for allowing an adjustment movement of the stationary tool part within a spatially limited adjustment range; an open position in which the claws (21a, 21b) release the mounting part such that the stationary tool part is separable from the holding device, wherein the cable processing apparatus comprises a tensioning device for the mounting part adapted to apply a tensioning force to the mounting part relative to an attachment surface provided on the crimping device, wherein the stationary and movable tool parts of the crimping cassette are configured to act together in a crimping operation of the crimping device of the cable processing apparatus, wherein the method comprises: Bringing the holding device into the unlocked closed position; Releasing the tensioning device; Inserting the stationary tool part of the crimping tool into a tensioning area of the tensioning device; Moving the moveable tool part towards the stationary tool part slightly before the moveable tool part touches the stationary tool part; Bringing the holding device into the open position; Moving the moveable tool part towards the stationary tool part until a pressing force between the moveable tool part and the stationary tool part is reached or exceeded, such that an alignment within the adjustment range takes place between the moveable tool part and the stationary tool part; Applying a tension with the tensioning device. Bringing the holding device into the unlocked closed position; Releasing the tensioning device; Inserting the stationary tool part of the crimping tool into a tensioning area of the tensioning device; Moving the moveable tool part towards the stationary tool part slightly before the moveable tool part touches the stationary tool part; Bringing the holding device into the open position; Moving the moveable tool part towards the stationary tool part until a pressing force between the moveable tool part and the stationary tool part is reached or exceeded, such that an alignment within the adjustment range takes place between the moveable tool part and the stationary tool part; Applying a tension with the tensioning device.