To gain access to the studs and nuts you will have to take out the interior quarter panels and all of the associated steps that it entails. Back seat ,fold down other trim etc.
A lot of the interior, after the seat is out - start at the top and work down, until you can remove the large lower panel. There are some rivets to drill out to if I remember right. And yes be very careful and if the pint is original don't scratch it. If the interior is "black" it's not really black - it's charcoal gray metallic