wires in trunk enclosure

My question is if you fiberglass a sub/amp rack into the side of your trunk, you do this so that it sits flush into the corner against the contours of the trunk. How do people bring out the power and RACA wires from the amp? I haven't posted pictures of my enclosure online yet, but found this one that is a similar, but smaller version... [url]https://i102.photobucket.com/albums/m103/rmlyn/2007%20Altima/Fiberglass%20Enclosure/Picture021.jpg[/url] THe bottom and back are flush against the inside of the car, so not sure how the box will still sit flush. Also, how do you route the wires from the opening in the box to the amp when everything is enclosed? Some simple questions, but ones that I want to make sure I understand so I don't F'up the box. :)