You can download the service manual for free for your model that answers all the questions but I love a good game.
1. Is your electrical box with the computer and starter solenoid.
2. Is the grounding plugs for your sparkplug wires. If you ever crank the engine over with the plugs out you ground the wires on those tabs.
3. Are the bailers, the use vacuum from the jet pump to pull water out of the hull like a bilge pump.
4. Is the tailcone of the expansion chamber for the exhaust.
5. is the Water Box also known as a muffler.