Transmission ID, need help

[4thgencreamsicle]

Ok. Complete newbie here. I’m looking at a continuous leak of trans fluid from a seal and the pan as well. While checking it out I’m thinking, hey, something's missing, but being the newb that I am it took me awhile. There’s no bell housing.

How do I go about IDing the transmission? Everything tells me to look for numbers, but I’m not seeing any except on the pan and those are talking about possible patent numbers (?). Where do they like to hide? I’ll include what pics I have.

Go easy on me! Like I said, I’m learning as I go.