These STLs replace the two outer cable covers in https://www.instructables.com/Retro-7-Segment-Clock-the-Final-Ones/ file 7SCv3_XL_Cable_Covers.stl. They should be printed the same way you do for the other cover components in the project.
(This is a partial remix of a project which is not on printables.com.)
The author hasn't provided the model origin yet.