Nigrán sits due west of the camino, to get there turn left on the first road after the camino path narrows near the roundabout mentioned above.
Otherwise keep on straight. The camino makes several crossings with busier roads, and when it does there exist a few options for stopping (bars, parks, etc). The way is well indicated, and the only possible confusion is a detour off the camino the private Freixo albergue.
You have several more kilometers of winding country roads before you emerge from the forest at the outskirts of Vigo. Arrows guide the way but as you are back into an industry heavy zone they require a bit more work to spot. They bring you to Castrelos Park, on the south side of Vigo.