Just as a bonus to what Deviate already told you... if no one has messed with those screws, they might be sealed with a cap.
To get at them, most people recommend to CAREFULLY drill the caps to take them off.
I used a screwdriver and a hammer, being careful not to hit them too hard so I didn't break other stuff. Hitting with the hammer and screwdriver also pops them out if you hit at the edge, so it's easy to take them out.
I guess just do the one you're most comfortable with. I'm not good with drills, so I wasn't comfortable using the method that others had suggested.
1985 VN700 unknown mileage (over 33K)
Iridium spark plugs
NGK wires and caps