Where to fill clutch fluid?

I have bought a 92 MX3 1.6. Don't mean to sound dumb but where do I add the fluid? I see the slave but no resivor. Thanks for any help

I know that on the GS (V6) it shares the brake fluid resevoir. Use DOT3 fluid available at any car store. Not sure if that helps for a 4 banger.

that did it, thanks