With the 400 Series of RealSense cameras, usually, the USB connector is on the 'Vision Processor D4' board that handles initial processing of captured camera data (a 400 Series camera is a pairing of a Vision Processor D4 board and a Depth Module camera board, interconnected by a rigid board or flexible cable).
System integrators are offered more flexibility by being able to obtain the Vision Processor D4 as the chip and its associated supporting components rather than an all-in-one pre-built board, so that it can be customized to a particular product design.
Below is a link to the version of Vision Processor D4 suited for custom integration.
https://www.framos.com/en/vision-processor-d4-20732
The current edition of the data sheet document for the 400 Series offers guidance for system integrators from page 71 onward.
https://www.intel.com/content/www/us/en/support/articles/000026827/emerging-technologies/intel-realsense-technology.html
Alternatively, if you would like to integrate the different camera technology of the SR300 / SR305 models (these are 'coded light' sensing patterns, whilst the 400 Series uses 'stereo'), the data sheet for the SR300 offers system integrator advice for setting up the connector parts from page 26 onward.
https://www.intel.co.uk/content/www/uk/en/support/articles/000023535/emerging-technologies/intel-realsense-technology.html
The SR300 does not use a separate Vision Processor D4 board, so may be worth considering if available space inside your product is a priority consideration and its technology is suited to your intended application for the camera.
