Style A: Style A can be mounted directly under the locomotive cab so that just the small light housing is visible.  Simply drill a #80 hole, insert the mounting tab and secure with glue.

Style B: This style has a half-etched fold line where the light housing meets the mounting tab.  Fold the light housing perpendicular to the mounting tab at the half-etched fold line.  Style B is perfect for mounting under the steps leading up to the locomotives cab/walkway.  Simply add glue to the tab and press in place (NO drilling required!).