I'm at work now, so I don't have the car in front of me, but I thought the key was part of the crankshaft that stuck out, so I'm not sure I can fish anything out, unless I am misunderstanding something. Do you have a link to a diagram, pictures or video?

To be clear:
I see the crankshaft has a place for the HB to slide onto and there is a piece that would be the male part on the side. Then the HB looks just like this picture:

http://i1001.photobucket.com/albums/.../L67/these.jpg

With the female notch that should line up with that tab. However, I'm having a hard time getting the HB to slide onto the crankshaft so I can get the HB bolt threads to start pulling the HB back on AND get the notch and key to line up.