Connecting 2 speakers to ddj400

I have 1 mackie thump right now and I am looking to get another. Will I need 2 rca male to dual rca female adapters to make it work? Or do I need some kind of external device thing?

(https://www.showmecables.com/rca-male-to-dual-rca-female-adapter?gclid=Cj0KCQjw2_OWBhDqARIsAAUNTTHHN0_xoTOYOdP-h6oA7t17yMGcPohV9Zol5i6acORTENyopHKCdBEaAh3pEALw_wcB)