I'm wondering what the purpose of the braze-on pictured below is? It's on the non-drive side of my fork. I thought it could have something to do with racks, but then I figured they would put one on both sides. It could be used for a cable-guide for disc brakes, but my fork doesn't have disc tabs. It seems like it's situated too low to be a cable guide for V-Brakes. The bike is a touring bike, and the fork does have rack mounting holes, if that will give any clues to it's use.
It's the factory fork from a 2011 Devinci Caribou. I think I've seen disk versions, but they are older, all their newer ones have cantilevers, no option for disks. It's not threaded, and there is no split. I may just be a wire-guide for whatever you choose to use it for, like a dynamo or speedometer. However, I think most wired speedometers are hard wired between the sensor and the computer, so I don't know how you would thread the cable through with the hardware on each end.