Where do I add transmission fluid on the car? on 1997 Ford Contour

I have a 97' Ford Contour that has been converted to a bi-fuel that can run on either regular unleaded or natural gas. It has a transmission leak; and I bought a product that is suppose to help it. I need to add it to the transmission fluid; but I'm not sure where to add it.

Thanks for the help.

Asked by for the 1997 Ford Contour
Is this an automatic or manual transmission?
It's an automatic 4 cylinder
1 more answer , 2 more comments
I found a TSB on your vehicle and you probably should contact Ford about repairing this properly
O.K> I really am a rookie. I couldn't see the transmission fluid dipstick. Can you give me an idea of where it's located?

Thanks for the response.
Thanks for the advice