broken bolt in rear end...help!

I was trying to replace a rear wheel seal on my f150, and found a broken bolt that secures the center shaft on the carrier in the diff.
Anyone run across this before? if so how do you get the shaft out?
any help would be appreciated.

I have a right angle drill that gets to those bolts perfectly. That's the only method I've found that works every time without cutting a carrier.

I have a right angle drill that gets to those bolts perfectly. That's the only method I've found that works every time without cutting a carrier.
Thanks for the info