Yes there is an open area Honda calls the glove box you drill a few holes and the wire goes out the back. Down to the existing fuse panel under the hood and I think to the battery. You still have the closable compartment under it.
I didn't like the fact I had to reach to the other side of the dash to reach the switches or see the voltmeter or that there was only room for 4 switches. I figured I'd have to add something somewhere else for more switches anyway so I came up with my own solution that was easier to reach.
Just different ways to skin a cat.