I started a campaign with the Safe House scenario, and am now quite advanced, and wish to establish a new access to the underground bunker, since the stairs that I have initially been given by the worldgen are kind of in the way of what i want to build. I do really wanna keep that underground bunker, since it has an ancient trade terminal which I want to keep on using. So, is there the possibility of creating a new access to that already-existing bunker at the current time?