(default markers.xc config file)
 
/**
 * Over-target markers. All settings moved to separate files.
 */
{
  “markers”: {
    // true – use standard client vehicle markers.
    “useStandardMarkers”: false, <<<< Setting this to ‘true’ will use the standard game client over-target-markers. Any configurations set by markers.xc, markersAliveNormal.xc, markersAliveExtended.xc, markersDeadNormal.xc, and markersDeadExtended.xc will be ignored. 

    // {{turret}} marker display strings.
    “turretMarkers”: {
      // Subject has stock turret and top gun can not be mounted. Subject is highly vulnerable.
      “highVulnerability”: “*”, <<<< Asterisk, used to denote that the vehicle has a stock turret and the top gun cannot be mounted.

      // Subject has stock turret and top gun can be mounted. Subject is somewhat vulnerable.
      “lowVulnerability”: “‘”   <<<< Apostrophe, used to denote that the vehicle has a stock turret and top gun can be mounted.
    },
 Just an example, other font characters that can be used to denote ‘Vulnerability” are glyphs 109 and 108 from the built-in/embedded/hard-coded ‘xvm’ font.

 The path of your markers…xc files are defined below, and used by markers.xc to call them up. 
    // ally
    “ally”: {
      “alive”: {
        “normal”: ${“markersAliveNormal.xc”:”ally”},
        “extended”: ${“markersAliveExtended.xc”:”ally”}
      },
      “dead”: {
        “normal”: ${“markersDeadNormal.xc”:”ally”},
        “extended”: ${“markersDeadExtended.xc”:”ally”}
      }
    },

    // enemy
    “enemy”: {
      “alive”: {
        “normal”: ${“markersAliveNormal.xc”:”enemy”},
        “extended”: ${“markersAliveExtended.xc”:”enemy”}
      },
      “dead”: {
        “normal”: ${“markersDeadNormal.xc”:”enemy”},
        “extended”: ${“markersDeadExtended.xc”:”enemy”}
      }
    }
  }
}