We Are the Minutemen - Provisioner?

[MrManovar6]

I'm using the "We are the Minutemen", and absolutely love it. I KNOW how to create Minutemen settlers, I read the descriptions, but I'm still not sure if they can be used for Supply Lines, or if I'm doing something wrong. I created one such Minutemen settler, and assigned said settler for Supply line duty between Sanctuary and Red Rocket. However, it doesn't seem to work, despite his name automatically changing to "Provisioner". I checked workshop inventory at both places, and they don't seem to share any clutter objects or food items (and I want them to since I'm using OCDecorator). And also, when you open the map, you can normally see the supply lines with the 'c' button, but again, nothing seems to have happened.