In your model year, I believe the 30 amp fuse is a fusible link, not a plug-in fuse.
Follow the big red lead from the battery to the first thing you get to. It should be a metal-ish can, about the size of a 35mm film canister. On top of that can will be the 30 amp main fuse, if your has a fuse. I suspect you'll see what looks like two small bolts with a strip of metal between them. In your case, it may be a strip of melted metal. That's the fusible link.
Actually, I just checked the online diagrams to be sure I wasn't leading you astray. In your picture, right above the voltage regulator (the part with the cooling fins on it at the very bottom) is a white plastic box with a black plastic cover. It has two red wires coming out of one end. Inside that box is the 30 amp fuse.
Currently Running Stable:
2010 Honda NT700V
1986 Shadow 700
1986 Honda Trail 110 (Postie Bike)
1987 Honda Rebel 450
1973 Honda Mini Trail 50