It doesn't matter what you do if you can't feel it.
I would start doing nothing but isolateral work. It's much easier to feel one side working then trying to get the entire back engaged which is what you're doing with 2 arm movements.
Seated one arm cable row. Neutral grip. Keep the shoulders square, keep the torso 90 degrees into contraction, don't lean back at all, don't twist at the waist during contraction. SLIGHT pull forward into the stretch, pause, think of squeezing your elbow as close along your leg as possible into the waist band of your shorts to make the weight move. AGAIN, squeeze the lat to make the weight move. Sit there and don't do a rep until you feel the lat fire to start the movement.
Don't twist the wrist, ever during back for anything.
This is just a "practice" set. Its worked very well at getting people to feel their lats working in the past.
Once you feel the lat fire, you can duplicate that in other movements quite easy