fuel pressure sensor harness location?

Does or has anyone changed the harness that feeds the pressure sensor fitted on the common rail? What i want is an idea of where the end connection fits (not the plug end that fits to the sensor). I've been told theres a plastic connector box fitted on the engine,, but where? thanks in advance..

C0604 ECM :doh:

Thanks for the Diag.... I have been told the cable from the pressure sensor (18" long) goes to a plastic box on the engine. Its this (if there is one) I need to locate..Just need a second opinion on this one........Thanks again.....