Based on Display electric pole connection path by repne.scasb
Simple explanation:

Mod searches shortest path between 2 selected poles and connects them with red or green wire (1 new shortcut for each)
Search can be tweaked as to only try to use poles that already connected via copper cable, or try to find any possible route. Ghosts can be included in path as well.

Previews:

1. Copper only, no ghosts (default behaviour)
   

2. Any path, no ghosts
   

3. Copper only, ghosts allowed
   

4. Any path, ghosts allowed