I personally would do stiff leg or romanian deads on squat days.
regular deads work the quads, and need so much lower back, I don't like to do them after squats, ever.
Your routine looks like a fullbody...doing it 3 times a week? if so, I'd squat two days with stiff and/or romanian deads, and then the other day, either don't squat, or keep it light, and do regular deads.