This is a front brake noodle -- you can see the same part on the Surly LHT. Looks like you may not need it since your front brake cable routing has a fairly well rounded radius. Check out the Surly web site to see how the noodle is installed, or a closeup of other pictures of LHT's. Here is a picture of the noodle installed on my 1983 Specialized Expedition. This same design noodle is carried by my LBS in both silver and black, and comes with the headset bracket/holder. Sorry the picture is out of focus but you get the idea. Note that there is very little space to include both the noodle and the adjuster. Hope this helps.