there are 2 screws on the bottom of the light housing. Don't mix these screws up with the adjustment screws near them. Hopefully you have the Motorcycle Owners Manual or MOM available. You can look at the front of the book to see where these screws are and compare to your bike. As for the maint sched just look towards the back of your MOM for that
if all else fails... call your local, reputable dealership... they can help and tell you over the phone usually on something simple like that. They are probably too busy to insist you come down for them to fix it. Also, if that doesn't work you will find some excellent info at your local bike parts store. Here in Reno we have a place called Street Rider. All they do is sell motorcycle stuff and they are very knowledgeable. Go to your local shop, buy your lamps and learn from their experiences. it's usually a fun trip
oh and btw... not a silly question! Don't be embarrassed!!