The only way to change them (which I have never done by the way) is by pulling the axleshaft from that side...you might be able to see the outer bearing with the cad out, but the inner one is between the axleshafts themselves...see if I can explain this:
The outer axleshaft has a small machined nipple on it that indexes into a corresponding machined hole of the inner shaft...it makes the two half run true with each other. Like I said, in my dad's 99 there was no bearing in there...it is simple a machined surface on a machined surface...I'm pretty sure that either my 94 or my 86 had a really small bearing in there.
If you pull the CAD, the outer bearing will be towards the differential...it supports the outer portion of the inner shaft at the CAD...
steved