The throttle lever on the airbus is a complex affair. The throttle levels are connected to a control unit underneath the pedestal and interfaced to a TCU or Throttle Control Unit:
It is best for those looking around to purchase a genuine throttle quadrant to look for one with the rods and TCU intact, or you will have non-functioning detents.
Some shots under the pedestal, and of the TCU:
Soarbywire 