Why it's on the list: Deadlift variations are rightfully considered whole-body exercises, specifically for the posterior chain. But research has shown that along with the hamstrings and glutes, they definitely hit the quads, as well—especially if you pull with a wider or sumo-style stance.
Deadlift Variations for Leg Development:
In your workout: For bodybuilders, the deadlift is commonly trained as part of back day. If you're training it with legs, you probably won't be able to go too heavy—keep the reps moderate, at least 5-8 reps per set, hit them after squats, and stop each set short of failure.