The 97 Ford Festiva manual transmission doesn't have a dipstick. You fill it through a
fill plug located on the
top or
side of the transmission case. You'll need a
workshop manual specific to your Festiva to identify the exact location of this plug and the correct type of gear oil to use.
Without a workshop manual, I strongly advise against attempting this. Incorrectly filling the transmission can cause serious damage. It's best to consult a repair manual or take it to a mechanic.