Being a noob, I would start with assuring you have the proper electrical system upgrades in place to run this kind of system.
I would start with the big three(google it), I would run two runs of zero gauge wire to the amp from the battery, and have two 0 gauge grounds.
Next I would go for an aftermarket high output alternator, and a second battery in the rear near the amplifier.
You amp will pull a conservative number of 200 amps. It may pull even more amps. I do not know of any stock alternator capable of putting out the juice the amplifier needs.
In the future list the specs on your equipment to make it easier for forum members to help you.
Without these upgrades, you will run into a lot of electrical problems eventually leading to the death of your amplifier from under voltage and possibly the sub woofer from clipping due to the low voltage the amplifier will get.
Back to your original question, use all power inputs provided on the amplifier.
Please post back with your specs.