Thanks for clearing.
Here are two ways: [clip#976]
One works with snapping. If the polygons are already equal in size and shape and orientation (congruent), then a single point snap should work. If they are not the same, then all points need to be moved separately, as well as with point snapping.
The second one just uses the idea of UV max, and that sets any four-sided UV to the border of the UV space. If they need to be rotated, select the polygon of the object, and use the Transform option, or Cycle UV CCW/CC
The main idea is to have the UV Polygons fill as much the UV space as possible, as it is typically the image space. So the texture is efficient. The new Packing option would not Layer similar UV, so I do not suggest this here.