Where is the part # for on a ford 1999 ford contour transmission found at?

Where is the part # for on a ford 1999 ford contour transmission found at? My transmission needs to be replaced and I have found a transmission but, I don't know where the numbers are on the one inside of my car can be located so they can be compared to the other transm. at the junk yard. Can anyone help me locate where I can find out where this part number can be found?Where is the part # for on a ford 1999 ford contour transmission found at?should be stamped on on of the sides of the tranny.