Sony MEX-XB100BT - Power Connectivity Question

Sup fellas. So here's the deal, I have been eyeing the recently released Sony MEX-XB100BT for about a month or so now. I finally decided on swapping out my double DIN WX-GT90BT for this because I heard so many good things about the internal amp (100w/40w RMS) of the MEX-XB100BT. (Review here It actually tested at 43w RMS) I don't feel like hooking up an external AMP since I often trade in vehicles. 40w RMS on each channel sounds great for this.

Anyway, this is the first head unit of it's kind and, of course, I have a quick question about powering it up. If you take a look at this product picture you can see it comes with the standard harness minus the ground (black) and power (yellow) wires and instead they are connected to a separate black fuse box. At the end of those cables, you can see that connectors are different. I was wondering if any of you gentlemen or ladies know how to connect these? I was reading the manual online and you can connect these either 1 of 2 ways -- connect them to the wiring harness (as you normally would on any other HU) or wire it directly to the battery. If I want to connect it to the harness, do I just crimp the wires like normal? However, Crutchfield and Sony recommends a direct connection to the battery for maximum performance. I kind of want to go this route instead. This seems different than wiring a regular amp. How would I wire the black fuse box to an amp wiring kit like this? How can I "crimp" the black box to the 12 gauge red wire from the wiring kit leading the battery?

Any help will be appreciated.

Thanks!