Couple of Questions...'72 Demon

1) Does anyone know what metal the interior door sill for a demon is made from? Stainless Steel or Aluminum?

2) The Map light switch on the drivers left side... is the light bulb on the passenger side under the dash? or is it suppose to turn on the dome light? The wiring diagram doesn't show the switch or blub?

The door sill metal is plain old non galvanized steel.
The switch was only for the floor light as far as I have ever seen.
I have wired that switch to the dome light on a few that the headlight switch didn’t control the dome for whatever reason though.