¶ Trailing End Anchorage
This "terminal" is simply a tension cable used to secure a length of guardrail and reduce the length of need. It provide no protection to end on impacts and so is typically placed at the downstream end of a guardrail system on divided highways.
¶ Operation
From the Intended Use section for the MGS 31" versions [1]
The trailing-end anchorage system should be used where needed to anchor downstream end of guardrail [where] (1) end-on impacts will not occur or (2) end terminal is placed outside of clear zone for opposite direction traffic.
¶ Versions
There are many non-proprietary versions of this terminal.
¶ MGS 31"
https://mwrsf.unl.edu/q&a/attachments/fb17f12d73e76210bcb4069c1a2bc1e1.pdf