The seat is held on by the four bolts that go through the passenger handles on either side of the seat. (2 on each handle) Once they are removed you just pull the seat up and forward. If you have heated seats you will have to unplug the heater under the seat before removing completely. I believe the panel covering the battery is held on by a screw, you should be able to see it very easily with the seat removed.
The panel covering the battery is not held on by a screw, just pull it off as you do the other panel covering the motor, the chrome panel, Check e-bay for a repair manual. Or get one from your Honda dealer, they are about $70.00 I think,.