88 VW fox, radiator problem

ok, i open the hood on this car, no radiator cap?

where is the cap so i can put water in it?
i also wanna do a flush to wash out old crap on it, how do i pour water in it or out?

Should have a resivoir under the hood somewhere. Its a big sphere with a cap on it. Thats where you'll add water. To empty water, just disconnect one of the bottom radiator hoses. Im not too familiar with the Fox, so dont take my word for it.