The fibre feeding the poles has a yellow stripe on it so is hard to miss.
Have seen this type of installation, however, in the instance I quoted earlier the single connection to the new "boxes" was a very fine black cable (or fibre) emerging from the normal metal shroud attached to the poles or from a cable bundle where mounted on terraced premises walls.
Perhaps the fibre splitter (if this is indeed fibre) is situated in the adjacent manhole ?
Pity I didn't get a photo I know, never thought at the time.
If it's of any interest or significance, the location was Cookstown, Co. Tyrone.