whether you have a back row machine inside your gym or not, this creative method is going to help you target your back in a different way. keep in mind that not all machines can be appropriate for this variation for everyone so if you do not feel the back working while doing this exercise, that machine might not be the best choice for you.
one of the upsides of this variation is because the bar you hold normally has a wide circumference(because it needs to transfer a lot of force from handles to the cables of the machine), it is going to make it easier to hold your grip like a hook and target the back better(unlike a dumbbell which is hard on fingers if you hold your hands like a hook).