The camera should be mounted on the inside of the lid, above the handle. Route the wire to the right side on the inside of the lid. Thread the camera wire through the channel pointed to in this picture:
Fish the camera wire to the other end of this channel and run it into the main frame of the machine (near the electronics):
Take off the right side panel to easily grab the camera cable into the frame of the machine. Drill a hole above the ESTOP button to pull the camera cable through:
In order to determine the minimum height for the camera to see your whole laser area, use the Camera Selection Help option in the Help menu in LightBurn. It will tell you the minimum mounting height to see the entire area of your laser, given the size of it. You then measure the height of your mounting location, and choose a camera that requires about 2" less height than that.
Note that there will always be a bit of image loss from undistorting the image, so you should always err slightly toward having a little extra room.