Connecting USB 3 camera head

I have a USB3.0 camera head that I want to use to input to the Nano. Is the best way to do this through the existing USB3 ports or is it better to convert the USB3 from the camera to MIPI connection?
As well, is there a way to hardwire the power supply? I have a need to eliminate the 5V in and need to hardwire the board with internal converter of 5V 2A.
The Nano is being integrated into a box with other components and the HDMI will be used as an output display, therefore all I/Os will be on the back of the box. I am trying to have the camera head plug into the front of the box.