I can see those drivers have stickers on them but can't read the details. What do they say for input amps? If I remember correctly most wall outlets are good for 15+ A but after that things might get dicey. At the least you may have to spread the loads across two cords. At worst you may have to get on two circuits that have their own breakers.
That's in the US of A, where your standard breaker is 20A and you want to avoid loading up any one circuit past 80%.
If combined draw is 6 or 7A you should be OK, depending on what else is on that circuit. If you're thinking about wiring a bunch of loose wires together you might want to buy a junction box, some wire nuts, and some wire clamps for the holes that you drill in the box.