Swingarm bolt

[goose202]

Hi all.

Trying to remove the swingarm bolt on my '04 EC300. It won't move. According to the parts diagrams, the head of the swingarm bolt has a side missing. At the risk of looking like a clown when someone points out something obvious I've missed... it looks like mine doesn't have the edge missing! I can't see how the bolt can be removed.

Pic 1
Pic 2

Is the bolt not moving because it's seized in there, or does my swingarm bolt look different to everyone else's? Help!

Thanks,
Bruce.