wanna get the v-taper look? try doing this exercise. you instantly feel it in the lats, especially outer fibers which help in looking bigger around the chest and slimmer around the abdominal area. you are going to feel it in the oblique muscles and triceps as well but the impact on your lats is significant.
just remember to stand wide and a little bit towards the machine, and also try bending to the side from your ribs as you are bringing your arms to your side(shoulder adduction).