Yeah- it's definitely the one I'm thinking. Hard to tell in the pic below, but that's where it goes.
I managed to get two of the clips off and have been hammering away trying to get the caps off the ujoint, but I can't get them yet. I managed to hammer one through enough that it gave me slightly more access and I was actually able to finagle the bolt in place and get a half turn on it, but still don't have access to tighten it down.
Good thing I've got nothing but time on my hands... I'm spending forever trying to do something that should be much more straight forward. I feel like I must be missing a key step to make this easier, but everything I read/watch suggests I'm attempting the right stuff.
I could probably unbolt the plate where the shaft attached to the diff but I don't think that would allow me to remove the shaft either- there doesn't seem to be enough play in it.