Sorry about delayed response... internet connection went down 1/10 and just got it back this morning (via different provider).Anyone have a photo of the mares tail?
I am having a hard time visualizing this with a three part rope on a bundle of cables.
Anyway, I've got no picture. Next best thing is an illustration...

This depicts a six-strand tail made from three-strand rope.
As for the name, imagine what it look's like when the strands aren't wrapped around cable.