You mean, should you do a lower body workout on the same day? You could do, but you don't need to. The CTX cardio smay be short, but they are intense and it is the legs that will power you through it. What is your focus for the day? If it is cardio, then do the CTX workout as set, giving it your all. If it is a lower body workout, then perhaps you could do that first, giving it your all, then do some or all of 10 10 10 afterwards if you still have the energy and leg power for it.
For maximum results in all your workouts, decide your focus and make that the mainstay of each day's workout. Cardio done on the same day as a full lower body workout will take away from the effectiveness of your weight training. But if you are feeling very strong, the cardio can serve as a pre-exhausting exercise to really fatigue each leg and glute muscle to the max.
Clare