Dana 60 S60 or Ford 9"

I thought you meant the big hole 3/4 the way up.

Theres a 1/2” pipe plug in the bottom to drain. Around that is a piece of 1-1/2 moly so you don’t jack right on the plug, you can also mount wishbone off the other side.
I was just f'n with you, I would never assume a fabo member was a fill from the bottom type