Automatic Transaxle problems

i have a
1995 Mazda 626 lx 4cylinder
I took apart the trani to do routine maintenance and found out
that my trani is a Ford not a Mazda trani
but i wouldnt know what kind of Ford would have a trani that would work
on my Mazda so i posted here.
The problem is i removed this part and ive never worked on a car with a part like this, and it doesnt want to go back in.
anyone know how to get it back in the right way?
(sorry the picture didnt want to go any smaller)

http://i72.photobucket.com/albums/i188/thisistemp/IMG_0826.jpg