[ORD 2020, R1] ESRI Shape file to ORD Terrain

I can find no resources or descriptions on how to create an OpenRoads Terrain from an ESRI Shape file. Everything that I've found leads back to Bentley Map. The Shape file contains unlabeled graphical contour lines. These lines are at zero elevation and contain a ContourEle Property that identifies the elevation. There are 1000's of contour graphics making it impossible to manually assign elevations to each one, and they are all on the same Level. Has the Bentley Map functionality to work with these Shape files been migrated forward into OpenRoads? How do I create an OpenRoads Terrain with this type of data? Any help will be immensely appreciated since I've been hunting, unsuccessfully, for a solution for several days now.