The master cylinder is on the engine side of the firewall, right atop the clutch pedal.
The slave cylinder may be in one of two places:
1987-1993 (BA-10/5 and AX-15,) it is combined with the throwout bearing into a single unit. You have to remove the transmission to replace it.
1994-2001 (AX-15 and NV3550,) it is a longish cylinder inside the bellhousing on the driver's side, and may be removed without removing the transmission. It moves the TO bearing by means of a fork and lever action.
What makes you think you have a problem?